SOPs

Calibration of pH meter, Purpose :

Calibration of pH meter, The purpose of this SOP is to describe the operation, calibration and cleaning of pH meter (Model: Mettler Toledo Seven Compact S220) used for the measurement of pH in the quality control and microbiology laboratory.

Calibration of pH meter, Scope :

This procedure describes the application of pH meter, for the determination of pH, in the analysis of raw materials, intermediates and formulated drug product in the quality control and microbiology laboratory of xx Pharmaceuticals Ltd.

Definitions / Abbreviation:

[][]SOP: Standard Operating Procedure.
[][]QC: Quality Control.
[][]pH: The pH is a number which represents conventionally the hydrogen ion concentration of an aqueous solution. It is the measurement of the acidity or alkalinity of an aqueous solution.
[][]Calibration: The set of operations which establish, under specified conditions, the relationship between values indicated by a measuring instrument or measuring system or values represented by a material measure and the corresponding known values of a reference standard.
[][]KCl: Potassium chloride.

Procedure:

Precaution(s):

[][]Store the electrode in 3M KCl solution; never store it in distilled or demonized water or any solution containing heavy metal ions as it may block the electrode membrane.
[][]Always keep the pH electrode wet and rinse it thoroughly with the sample to be measured before use.
[][]Avoid high humidity environments and static discharges since these are detrimental for a stable pH reading.
[][]Do not measure pH of a solution with high temperature.
[][]Try to avoid special measuring solutions such as Sulphide, high Alkaline, Albuminous solutions those can reduce the life of electrode.
[][]Never stir the electrode vigorously in solution during measurement of pH.
[][]After washing, dry the electrode with tissue paper but do not wipe the end of with tissue paper.
[][]Never stir the electrode vigorously in solution during measurement of pH.
[][]After washing, dry the electrode with tissue paper but do not wipe the end of with tissue paper.
[][]Always use fresh and unused buffer for calibration.
[][]Perform a recalibration:
[][]When reference electrode is changed.
[][]After testing aggressive chemicals (such as strong acid or base).

Calibration:

[][]Switch on the power from its main.
[][]Power on the pH meter and printer.
[][]Remove the electrode from the potassium chloride (KCl) solution, rinse it with purified water and soak the excess water with tissue paper very carefully.
[][]Calibrate the instrument daily before use by the three buffer solutions of pH values 7.00, 4.00 and 10.0.
[][]Immerse the electrode in buffer solution of pH value of 7.00 and stir gently and press [CAL] .
[][]Wait until a stable endpoint has been reached.
[][]Hear the ‘beep’ point.
[][]See the sign (/A) at the right side of the display.
[][]Rinse the electrode with purified water and soak the excess water with issue paper very carefully.
[][]Repeat the steps from 7.1.5 to 7.1.9 for second and third calibration for the standard solution of pH values respectively 4.00 and 10.00.
[][]Select “End”.
[][]Select “Save”.
[][]Select “Data”.
[][]Select “Calibration Data”.
[][]Select “pH”.
[][]Select “Review”.
[][]Select “Expertpro ISM”.
[][]Select “Transfer”.
[][]Select “Exit” for 5 times to reach the main menu.
[][]The slope should be 90% – 105%, i.e. at print data, S(B1/B2) and S(B2/B3) = 90% – 105% and offset value will be ± 30 mV, i.e. at print data, off.(B1/B2) and off.(B2/B3) = ±30 mV.

Electrode condition:

Maintenance of the Reference Electrode:

[][]If the electrode slope value falls rapidly, or if the response becomes sluggish or inaccurate, the following procedure should be performed one by one.
[][]Change the reference electrolyte solution every six months.
[][]Degrease the membrane with cotton wool soaked in soap solution.
[][]Soak the tip of the electrode in 0.1M hydrochloric acid overnight.
[][]If all these fail, the electrode must be replaced with a new electrode.
[][]Any replacement of the electrode must be recorded in the log book
[][]Verify the pH of any check buffer (buffer range: 4-9 pH), if reading is within limit (Certificate value ± 0.05), calibration confirms.
[][]Remove the electrode from buffer solution, rinse it with purified water and soak the excess water with tissue paper.
[][]Rinse the electrode with saturated potassium chloride (KCl).
[][]7.1.26 Record the calibration status in Logbook for daily calibration of pH Meter (Seven Compact S220) as per Annexure – I
[][]Power off the pH meter and printer.
[][]Switch off the power from its main.

Operation

[][]Ensure that working area is clean.
[][]Pour enough sample solution into a measuring beaker so that the level of the sample is above the junction of the electrode.
[][]Ensure that the pH meter is cleaned and calibrated on the day use.
[][]Remove the electrode from the potassium chloride (KCl) solution, rinse it with purified water and soak the excess water with tissue paper very carefully. .
[][]Switch on the power its main.
[][]Power on the pH meter and printer.
[][]Gently stir the sample and dip the pH electrode into the solution.
[][]Press [READ] button and wait until a stable endpoint has been reached.
[][]Hear the “beep” sound.
[][]See the sign (/A) at the right side of the display.
[][]Select “Data”.
[][]Select “Measurement Data”.
[][]Select “Review”.
[][]Select “Partial” by using “↓”.
[][]Select “by measurement mode” by using “↓”.
[][]Select “pH”.
[][]Select “transfer”.
[][]Collect the printed result from the printer.
[][]Select “Exit” for 6 (six) times to reach the main display/menu.
[][]Take the electrode out of the solution and rinse with purified water and soak the excess water by tissue paper.
[][]For additional samples repeat the steps from 7.2.7 to 7.2.20 until the sample has been measured.
[][]After taking the measurement, rinse the electrode with saturated potassium chloride (KCl).
[][]Record the measurement data in the Operation Logbook of pH Meter (Seven Compact S220) as per Annexure – II.
[][]Power off the pH meter and printer.
[][]Switch off the power from its main.

Cleaning and maintenance:

[][]Clean the outside case of the pH meter using a mild detergent or disinfectant (e.g.70% ethanol) if required.
[][]Clean the area around the pH meter and wipe away any spillage immediately. Special care should be exercised when cleaning up concentrated HCl (usually) or concentrated NaOH (usually) used for adjusting the pH of solutions.
[][]When required, clean all wires and contacts to avoid corrosion.
[][]Inspect the cables of the electrodes for any signs of broken insulation.
[][]Inspect the pH electrode for any cracks in its stem or bulb.
[][]Rinse off any salt deposits on the top of the electrode using water.
[][]If contamination of the glass bulb is suspected, restoration can be attempted as follows:
[][]Soak electrode in 0.1 M HCl or 0.1 N HNO3 for 15 minutes.
[][]Oily or greasy deposits may be removed by methanol.
[][]After the cleaning stage, rinse the electrode in distilled water and replace the internal filling solution (4M KCl if appropriate) for at least 1 hour before taking any measurements.
[][]Make sure the electrode is always kept filled with the appropriate filling solution.

Annexure: Calibration of pH meter

Annexure-I: Logbook for daily calibration of Seven Compact S220 pH Meter.
Annexure-II: Operation Logbook of Seven Compact S220 pH Meter.

Calibration of FTIR, Purpose:

Calibration of FTIR, The purpose of this SOP is to describe the operation, calibration and cleaning of FTIR Spectrophotometer (Shimadzu, IR Affinity-1) used in the quality control laboratory at XX Pharmaceuticals Limited.

Scope

This procedure is applicable for FTIR Spectrophotometer (Shimadzu, IR Affinity-1), installed in the quality control laboratory of XX Pharmaceuticals Limited.

Definitions / Abbreviation:

Standard Operating Procedure (SOP): Standard Operating Procedure. A written authorized procedure, which gives instructions for performing operations.

[][]QC: Quality Control.

[][]FTIR: Fourier Transform Infrared.

Responsibilities

[][]Executive/ Sr. Executive, QC

[][]To ensure that this procedure is followed.

[][]To maintain the records properly as per SOP

Manager, Quality Control

[][]To ensure that this procedure is kept up to date.
[][]To confirm that the SOP is technically sound and reflects the required working practices.
[][]To arrange training on the SOP to all concerned personnel and to ensure implementation of the SOP after training.
[][]Schedule calibration of the instrument at the defined intervals.

Head of Quality Assurance

[][]Approval of the SOP.
[][]To ensure the overall implementation of the SOP.

Procedure: Calibration of FTIR

General Procedure:

[][]Ensure that the instrument is clean and calibrated.
[][]Connect the instrument properly with the power supply.
[][]Switch “ON” the main switch, power switch of the instrument situated at the backside panel, printer and computer.
[][]Allow the instrument initialize for at least 1 hour.

Disk preparation for solid sample:

[][]Mix 5 to 10 mg of sample with 200 to 400 mg of Potassium Bromide (KBr) [IR Grade].
[][]Grind the mixture to very fine powder with agate mortar.
[][]Pour the mixture into the barrel and carefully insert the plunger with its polished face downward.
[][]Maintain the hydraulic pressure 50 KN to 60 KN of the barrel for 1-2 minutes.
[][]Release the pressure and take out the disk from the barrel.
[][]For sample of liquid material using sealed liquid cell:
[][]Inject the liquid sample (pure or in solution) in sealed liquid cell.
[][]Plug to close both the slots of sealed liquid cell.
[][]For sample of liquid material which converted to solid (Nujol preparation) and measurement using NaCl demountable liquid cell:
[][]Put the cell window on the cell window holder and place the spacer of appropriate thickness on the cell window.
[][]Take 3 to 5 mg of sample with 2 to 3 drop of Nujol in a mortar and mix properly.
[][]Insert sample inside the spacer with a spatula. Put another cell window on the spacer and fit the metal plate on it.
[][]Fasten those plates with the four screws. Do not fix them with excessive force. It is enough to fasten them tightly by hand.

Operation Procedure (FTIR): calibration of FTIR

[][]Double click on “IRsolution” software icon.
[][]Press Measure
[][]Select FTIR Parameters in parameter window as follows:
[][]Data :
[][]Measurement Mode: % Transmitance ,
[][]Resolution: 2
[][]Apodization: Happ-Genzel
[][]No of Scans: 10
[][]Range (cm-1): Min: 400 cm-1 Max: 4000 cm-1
[][]Instrument:
[][]Beam: Internal
[][]Detector: Standard
[][]Mirror speed: 2.8
[][]More:
[][]Mode: Power
[][]Remove sample, if any, from the sample compartment.
[][]Click on Measurement then “Initialize” then “Yes”.

[][]After successful initialization, click BKG then “OK”. Wait till window on the screen is displayed as last Bkg.
[][]After ‘Bkg scan’, put the sample disk in the sample chamber, with the help of sample holder and close the chamber.
[][]Enter the Sample name, Batch No., Sample ID. in comment box and enter the data file location in Data file box.
[][]Click Sample to measure sample. Wait till the actual sample IR scan is displayed.
[][]Click on the spectrum window. Select Calculate  peak table. Type threshold: 60.00.
[][]Click on Calc, OK
[][]Compare the Spectrum in computer screen. View the IR scan of standard, click on Manipulation 2 then “Purity” then “Yes”.
[][]Again view the IR scan of sample, click on Manipulation 2  “Purity”  “Calc”  “OK”.
[][]After comparison with standard and sample then click file and open file as required. Then click Window  “Join visible”  “Calc”  “OK”.
[][]Purity index should be within 0 .9500 – 1.0000.
[][]A disc is rejected if visual examination shows lack of uniform transparency or when transmittance at about 2000 cm-1 (5 µm) in the absence of a specific absorption band is less than 60 % without compensation, unless otherwise prescribed in individual monograph.
[][]For printing of spectrum, click File  “Print preview”. Select respective necessary template and then print.
[][]Close the parameter window and the Software window.
[][]Shutdown PC, switch off Printer.
[][]Power OFF Spectrophotometer.
[][]Take out the liquid cell from the instrument.
[][]Discard the disk /Nujol / liquid sample.
[][]Clean the holder and liquid cell with dry and clean tissue paper.
[][]In case of sealed liquid cell mop and wash with IPA or absolute Ethanol and in case of demountable liquid cell mop and wash with Chloroform or Carbon Tetrachloride.
[][]Keep them in specified desiccator.
[][]Rub mortar, pestle, barrel & plunger with tissue paper to make them free from dust.
[][]Mop them with a tissue paper soaked in absolute ethanol.
[][]Keep them in a desiccator for next operation.
[][]Record all analysis in operation log book as per Annexure-II.

Operation Procedure (ATR):

Running a sample:

[][]Turn on the computer and crick on the respective software on the desktop.
[][]Set the MIRacle/ MIRacle A Base Unit to the instrument.
[][]Before initialization, set FTIR Parameters in parameter window as follows:
[][]Data :
[][]Measurement Mode: % Transmitance ,
[][]Resolution:2
[][]Apodization: Happ-Genzel
[][]No of Scans: 10
[][]Range (cm-1): Min : 700 cm-1 Max : 4000 cm-1
[][]Click on Measurement then “Initialize” then “Yes”. Click “cancel” option for auto adjustment.
[][]Click on Measurement then “Auto adjustment (Fine)” then “Yes”.
[][]After autoadjustment, click BKG then “OK”. Wait till window on the screen is displayed as last Bkg.
[][]Set the clamp to the base. Place sample on the ZnSe crystal- Liquids -place a drop of sample on the ZnSe crystal. Place a small neat solid sample on the ZnSe crystal with a spatula. Adjust the knob of the ATR until the pressure reads 12.
[][]Make sure that no acid sample (pH below 5), strong alkaline sample (pH more than 9) or liquid which give damage to PTFE should not be place on ZnSe prism.
[][]Enter the Sample name, Batch No., Sample ID. in comment box and enter the data file location in Data file box. Click Sample to measure sample. Wait till the actual sample ATR scan is displayed.

Working up the Data:

[][]Compare the Spectrum in computer screen. View the ATR scan of standard, click on Manipulation 2 then “Purity” then “Yes”.
[][]Again view the ATR scan of sample, click on Manipulation 2  “Purity”  “Calc”  “OK”.
[][]After comparison with standard and sample then click file and open file as required. Then click Window  “Join visible”  “Calc”  “OK”.
[][]For printing of spectrum, click File  “Print preview”. Select respective necessary template and then print

Calibration:

[][]Calibrate the FTIR Spectrophotometer at 6 month’s frequency either by following procedure or as per supplier’s protocol:
[][]Power ON the Spectrometer. Wait for at least 1 hour. Power ON PC & Printer.
[][]Double click on “IRsolution” software icon. Press Measure
[][]Select FTIR Parameters in parameter window as follows:
[][]Data :
[][]Measurement Mode: % Transmitance ,
[][]Resolution : 2
[][]Apodization : Happ-Genzel
[][]No of Scans : 10
[][]Range (cm-1) : Min : 400 cm-1 Max : 4000 cm-1
[][]Instrument :
[][]Beam : Internal
[][]Detector : Standard
[][]Mirror speed : 2.8
[][]More :
[][]Mode : Power
[][]Remove sample, if any, from the sample compartment.
[][]Click on Measurement then “Initialize” then “Yes”.
[][]After successful initialization, click BKG then “OK”. Wait till window on the screen is displayed as last Bkg.
[][]After ‘Bkg scan’, place the Polystyrene film in the sample chamber and close the chamber.
[][]Enter the Polystyrene 1 and Wave number verification in comment box and enter the data file location in Data file box.
[][]Click Sample to scan the polystyrene film (0.05 mm thick). Wait till the actual sample IR scan is displayed.
[][]Click on the spectrum window. Select Calculate  peak table. Type threshold: 65.00.
[][]Click on Calc  OK
[][]For printing of spectrum, click File  “Print preview”. Select respective necessary template and then print. Collect Polystyrene spectrum and peak table printed in two pages.

Limit of Wave Number Accuracy

[][]Check the maximum at following wave numbers (cm-1): 3060.0 (±1.5) cm-1, 2849.5 (±1.5) cm-1, 1942.9 (±1.5) cm-1, 1601.2 (±1.0) cm-1, 1583.0 (±1.0) cm-1, 1154.5 (±1.0) cm-1, 1028.3 (±1.0) cm-1.
[][]Resolution of apparatus
[][]Resolution due to transmittance:
[][]Record the Spectrum of a polystyrene film of approximately 35 µm thickness using Measuring Mode: % T.
[][]Measure the percentage transmittance at the transmission maximum at 2870 cm-1 (3.48 µm) and that at the transmission minimum at 2849.5 cm-1 (3.51 µm).
[][]Measure the percentage transmittance at the transmission maximum at 1589 cm-1 (6.29 µm) and that at the transmission minimum at 1583 cm-1 (6.32 µm).
[][]Record the results in calibration information sheet as per Annexure-I.

Acceptance criteria:

[][]The difference between the % transmittance at the transmission maximum at 2870 cm-1 (3.48 µm) and that at the transmission minimum at 2849.5 cm-1 (3.51 µm) must be greater than 18.
[][]The difference between the percentage transmittance at the transmission maximum at 1589 cm-1 (6.29 µm) and that at the transmission minimum at 1583 cm-1 (6.32 µm) must be greater than 10.

Resolution due to Absorbance:

[][]Record the Spectrum of a polystyrene film of approximately 35 µm thickness using Measuring Mode: Abs.
[][]Measure the absorbance at the absorption minimum at 2870 cm-1 and the absorption maximum at 2849.5 cm-1.
[][]Measure the absorbance at the absorption minimum at 1589 cm-1 and the absorption maximum at 1583 cm-1.
[][]Record the results in calibration information sheet as per Annexure-I.

Acceptance criteria:

[][]The difference between the absorbance at the absorption minimum at 2870 cm-1 and the absorption maximum at 2849.5 cm-1 is greater than 0.33.
[][]The difference between the absorbance at the absorption minimum at 1589 cm-1 and the absorption maximum at 1583 cm-1 is greater than 0.08.
[][]If the calibration is not within the specified standards, check the cleanliness of polystyrene film again and repeat the calibration.
Wavelength Repeatability Test:
[][]Repeat the Spectrum of the polystyrene film and Superimposed one after another of the absorption bands at 2849.5 cm–1 (3.51 µm), 1601.2 cm–1 (6.25 µm), 1028.3 cm –1 (9.72 µm).
[][]Acceptance Criteria: Compare the difference within 0.5% of the wave number scale and Purity index should be within 0.9500 – 1.0000
[][]Affix the label “CALIBRATED “on the equipment if all results are satisfactory. If the equipment found out of calibration limit affix “NOT FIT FOR USE” label and inform supplier.

Cleaning procedure:

[][]Clean the instrument with clean dry cloth daily.
[][]Remove your sample from the ATR, by using a cloth that is damped with acetone.
[][]Clean the plunger in the same way, if it made contact with sample.
[][]Never squirt (spray) acetone directly on the platform.

Annexure: Calibration of FTIR

Annexure-I: Calibration Information Sheet for FTIR Spectrophotometer
Annexure-II: Operation Logbook for FTIR Spectrophotometer

Electric Analytical Balance Calibration; Purpose :

Electric Analytical Balance Calibration; The purpose of this SOP is to describe the operation, calibration, cleaning and daily accuracy check of Electric Analytical Balance

Scope :

This procedure is applicable for Electric Analytical Balance , installed in the quality control laboratory of XX Pharmaceuticals Limited.

Definitions / Abbreviation:

[][]SOP: Standard Operating Procedure
[][]QC: Quality Control

Responsibilities:

Executive/Sr. Executive, QC

[][]To ensure that this procedure is followed.
[][]To ensure daily accuracy check of the balances.
[][]To maintain the records properly as per SOP.
[][]To preserve calibration, daily accuracy check record.

Manager, Quality Control

[][]To ensure that this procedure is kept up to date.
[][]To confirm that the SOP is technically sound and reflects the required working practices.
[][]Arrange training on the SOP to all concerned personnel.
[][]To ensure implementation of the SOP after training.

Head of Quality Assurance

[][]Approval of the SOP
[][]To ensure the overall implementation of the SOP.

Procedure:

General precautions:

[][]Do not move or replace Balance after calibration. If require, calibrate after movement.
[][]Do not place Balance near to heat generating equipment or direct sunlight.
[][]Clean up any spillage in or around the balance immediately after operations.
[][]Proper protective clothing such as safety glasses, gloves and Laboratory coat must be worn during weighing process.
[][]Do not use sharply pointed objects to operate the keyboard of balance.
[][]Do not use cleaning agents which contain solvents or abrasive ingredients.

Operation:

To start up:

[][]Level and adjust at each time it is moved to a new location. The balance is exactly horizontal when the air bubble is in the middle of the level glass. Adjust the two front leveling feet appropriately until the air bubble comes to rest exactly in the middle of the glass.
[][]Plug the AC adapter and connect the power supply. Connect the printer to the balance.
[][]Switch on the printer using I/O switch.
[][]Press On/Off () button to on the Electric Analytical Balance. Display will show 0.0000g.
[][]Convert the weighing unit from g into mg, press scroll down button if necessary.
[][]Allow the balance to warm up to enable it to adapt itself to the ambient condition.
[][]Long press for menu button and select ‘BASIC’ by single press Enter button
[][]Set date, time and unit using keys and Enter button and save the settings using button.
[][]Press cancel (C) button to return come out of that ‘BASIC’ option and return to its main menu

Weighing:

[][]Check the machine is clean and calibrated. Then remove all loads from weighing pan.
[][]When zero (0.0000 g) reading is displayed, the balance is ready for operation. If the display shows greater than or less than zero, press tare button to tare the balance.
[][]If the balance is not in the weighing mode, press and hold the key down until ‘WEIGHING’ in the display.
[][]Use handle/coupling element for the operation of the draft shield door of the both side of the instrument.
[][]Open right/left/upper sliding window of the instrument.
[][]Place empty container/weighing paper on the pan of the balance. Close the sliding window.
[][]The weight is displayed. Allow the reading to stabilize and wait until the instability detector disappears from the left side of the display and the stability beep sounds.
[][]Press Tare button to tare the balance. When zero (0.0000 g) reading is displayed, the balance is ready for weighing.
[][]The weighing-in aid is a dynamic graphic indicator which shows the used amount of the total weighing range. It can be recognized at a glance when the load on the balance approaches the maximum load.
[][]Add weighing sample (Maximum 120 g) on the container/weighing paper using weighing spoon. Close the sliding window. The net weight is now displayed.
[][]Allow the reading to stabilize and wait until the instability detector (O) disappears from the left side of the display and the stability beep sounds
[][]To get printout of the weight, press print button.
[][]For performing another weighing press Tare button to tare the balance and follow previous steps from to increase or decrease digit, press display resolution button.
[][]Finally, press and hold On/Off button button untill ‘SHUT OFF’ shows on the display.
[][]Fill up the Operation Log book for Semi-Micro Balance (as per Annexure-II).

Daily Accuracy Check:

[][]Perform the Internal and External Calibration as per below mentioned procedure
[][]Take 20 g, 70 g of certified weight and clean it with a soft cloth.
[][]Use tare button to tare the balance before start with a weighing.
[][]Always press button to tare the balance between the interval of one weight to another and observe whether the instability detector (O) disappears from the left side of the display or not and the balance will give a stability beep sounds.
[][]Open one sliding window and place the weights separately at the center of the weighing pan, close the sliding window and allow the reading to be stabilized and wait until the instability detector (O) disappear from the left side of the display and the stability beep sounds.
[][]Print the results by pressing print button if necessary.
[][]Record the value of those weights in Log Book for Daily Accuracy Check (as per Annexure-I).

Calibration:

Internal Calibration:

Manual Adjustment with Internal weight:

[][]Long press menu button and press scroll down button to go to ‘ADVANCED’ option.
[][]Select ‘ADVANCED’ by pressing Enter button.
[][]Press scroll down button once to select ‘CAL’ option by pressing Enter button.
[][]Then select ‘ADJ. INT’ using scroll down button and then press Enter button.
[][]Press Cancel (C) twice and save the settings if required by scrolling down button and press Enter button and then return to its main menu.
[][]Unload weighing pan Press and hold calibration button to execute ‘Internal Adjustment’.
[][]The balance adjusts itself automatically. The adjusting is finished when the message “ADJ.DONE” appears briefly on the display. The balance returns to the last active application and is ready for operation.
[][]After adjustment, the result of the calibration will be printed out automatically or press print (button for print copy.

External Calibration:

Manual Adjustment with External weight:

[][]Long press menu button and press scroll down button to go to ‘ADVANCED’ option.
[][]Select ‘ADVANCED’ by pressing Enter button.
[][]Press scroll down button once to select ‘CAL’ option by pressing Enter button.
[][]Select ‘ADJ. EXT’ by using scroll down and then press Enter button.
[][]Set the adjustment weight (100g) by using -/+ key for External Calibration and press Enter button.
[][]Then press cancel (C) button twice and save the settings if required by using -/+ key and press Enter button and then return to its main menu.
[][]Unload weighing pan Press and hold calibration button to execute ‘External Adjustment’.
[][]The required predefined adjustment weight value flashes on the display.
[][]Place adjustment certified weight on the center of pan. The balance adjusts itself automatically.
[][]When ‘0.0000 g’ flashes, remove the adjustment weight.
[][]The adjustment is finished when the message ‘ADJ DONE’ appears briefly on the display. The balance returns to the last active application and is ready for operation.
[][]After adjustment, the result of the calibration will be printed out automatically or press print button for print copy.

Eccentricity:

[][]Take 20 g, 70 g of certified weight and clean it with a soft cloth.
[][]Use tare button to tare the balance before start with a weighing.
[][]Always press button to tare the balance between the interval of one weight to another and observe whether the instability detector (O) disappears from the left side of the display or not and the balance will give a stability beep sounds.
[][]Place 50g weight at center, Left Rear, Right Rear, right Front, Left Front and center on the pan again separately.
[][]Allow the reading to be stabilized in each time while weighing and wait until the instability detector (O) disappear from the left side of the display and the stability beep sounds.
[][]Press print button separately to print each individual reading in same print page.

Linearity:

[][]Use Tare button to tare the balance before start with a weighing.
[][]Always press button to tare the balance between the interval of one weight to another and observe whether the instability detector (O) disappears from the left side of the display or not and the balance will give a stability beep sounds.
[][]Place 10 g, 20 g and 50 g on the center of pan separately.
[][]Allow the reading to be stabilized in each time while weighing and wait until the instability detector (O) disappear from the left side of the display and the stability beep sounds.
[][]Press Print ( ) button separately to print each individual reading in same print page.

Sensitivity:

[][]Use Tare button to tare the balance before start with a weighing.
[][]Always press button to tare the balance between the interval of one weight to another and observe whether the instability detector (O) disappears from the left side of the display or not and the balance will give a stability beep sounds.
[][]Place 100 g on the center of pan.
[][]Allow the reading to be stabilized in each time while weighing and wait until the instability detector (O) disappear from the left side of the display and the stability beep sounds.
[][]Press Print ( ) button separately to print each individual reading in same print page.

Repeatability:

[][]Use Tare button to tare the balance before start with a weighing.
[][]Always press button to tare the balance between the interval of one weight to another and observe whether the instability detector (O) disappears from the left side of the display or not and the balance will give a stability beep sounds.
[][]Place 100 g on the center of the pan for ten times separately.
[][]Allow the reading to be stabilized in each time while weighing and wait until the instability detector (O) disappear from the left side of the display and the stability beep sounds.
[][]Press Print ( ) button separately to print each individual reading in same print page.

Result:

[][]Record all the values for calibration in Calibration Information Sheet for Electric Analytical Balance (as per Annexure-III).
[][]Perform the Calibration of the Electric Analytical Balance once after every six months.

Cleaning:

[][]Ensure that no liquid comes into contact with the balance and AC adapter.
[][]Remove all objects from the balance.
[][]Clean the pan with soft brush followed by with soft clean cloth.
[][]Clean all of the parts of the balance with clean dry cloth.
[][]Set the parts of weighing pan carefully.

Annexure:

Annexure-I: Log book for Daily Accuracy Check of Electric Analytical Balance
Annexure-II: Operation Log book for Electric Analytical Balance
Annexure-II: Calibration Information Sheet for Electric Analytical Balance

Calibration of Semi-Micro Balance; Purpose :

Calibration of Semi-Micro Balance; The purpose of this SOP is to describe the operation, calibration, cleaning and daily accuracy check of Semi-Micro Balance (Model: MS205DU).

Scope :

This procedure is applicable for Semi-Micro Balance (Model: MS205DU), installed in the quality control laboratory of XX Pharmaceuticals Limited.

Definitions / Abbreviation:

[][]SOP: Standard Operating Procedure
[][]QC: Quality Control

Responsibilities:

Executive/Sr. Executive, QC

[][]To ensure that this procedure is followed.
[][]To ensure daily accuracy check of the balances.
[][]To maintain the records properly as per SOP.
[][]To preserve calibration, daily accuracy check record.

Manager, Quality Control

[][]To ensure that this procedure is kept up to date.
[][]To confirm that the SOP is technically sound and reflects the required working practices.
[][]Arrange training on the SOP to all concerned personnel.
[][]To ensure implementation of the SOP after training.

Head of Quality Assurance

[][]Approval of the SOP
[][]To ensure the overall implementation of the SOP.

Procedure:

General precautions:

[][]Do not move or replace Balance after calibration. If require, calibrate after movement.
[][]Do not place Balance near to heat generating equipment or direct sunlight.
[][]Clean up any spillage in or around the balance immediately after operations.
[][]Proper protective clothing such as safety glasses, gloves and Laboratory coat must be worn during weighing process.
[][]Do not use sharply pointed objects to operate the keyboard of balance.
[][]Do not use cleaning agents which contain solvents or abrasive ingredients.

Calibration of Semi-Micro Balance; Operation:

To start up:

[][]Level and adjust at each time it is moved to a new location. The balance is exactly horizontal when the air bubble is in the middle of the level glass. Adjust the two front leveling feet appropriately until the air bubble comes to rest exactly in the middle of the glass.

[][]Plug the AC adapter and connect the power supply. Connect the printer to the balance.
[][]Switch on the printer using I/O switch.

[][]Press On/Off button to on the Semi-Micro Balance. Display will show 0.00000 g.
[][]Convert the weighing unit from g into mg, press scroll down button if necessary.
[][]Allow the balance to warm up to enable it to adapt itself to the ambient condition.
[][]Press menu button and select ‘BASIC’ by pressing Enter button
[][]Set date, time and unit using -/+ keys and Enter button and save the settings.
[][]Press cancel (C) button to return come out of that ‘BASIC’ option and return to its main menu.
[][]Perform the daily accuracy check at the starting of the day.

Calibration of Semi-Micro Balance; Weighing:

[][]Check the machine is clean and calibrated. Then remove all loads from weighing pan.
[][]When zero (0.00000 g) reading is displayed, the balance is ready for operation. If the display shows greater than or less than zero, press Tare button to tare the balance.
[][]If the balance is not in the weighing mode, press and hold the key down until ‘WEIGHING’ in the display.
[][]Use handle/coupling element for the operation of the draft shield door of the both side of the instrument.
[][]Open right/left/upper sliding window of the instrument.
[][]Place empty container/weighing paper on the pan of the balance. Close the sliding window.
[][]The weight is displayed. Allow the reading to stabilize and wait until the instability detector (O) disappears from the left side of the display and the stability beep sounds.

[][]Press Tare button to tare the balance. When zero (0.00000 g) reading is displayed, the balance is ready for weighing.
[][]The weighing-in aid is a dynamic graphic indicator which shows the used amount of the total weighing range. It can be recognized at a glance when the load on the balance approaches the maximum load.
[][]Add weighing sample (Maximum 220 g) on the container/weighing paper using weighing spoon. Close the sliding window. The net weight is now displayed.
[][]Allow the reading to stabilize and wait until the instability detector disappears from the left side of the display and the stability beep sounds
[][]To get printout of the weight, press print button.

[][]For performing another weighing press tare (O/T) button to tare the balance and follow all steps described above. To increase or decrease digit, press display resolution button.

[][]Finally, press and hold On/Off button ( ) button until ‘SHUT OFF’ shows on the display.
[][]Fill up the Operation Log book for Semi-Micro Balance (as per Annexure-II).

Daily Accuracy Check:

[][]Perform the Internal and External Calibration as per below mention Steps under Calibration.
[][]Take 50 g, 150 g of certified weight and clean it with a soft cloth.
[][]Use tare button to tare the balance before start with a weighing.
[][]Always press button to tare the balance between the interval of one weight to another and observe whether the instability detector (O) disappears from the left side of the display or not and the balance will give a stability beep sounds.
[][]Open one sliding window and place the weights separately at the Centre of the weighing pan, close the sliding window and allow the reading to be stabilized and wait until the instability detector (O) disappear from the left side of the display and the stability beep sounds.
[][]Print the results by pressing print button if necessary.
[][]Record the value of those weights in Log Book for Daily Accuracy Check (as per Annexure-I).

Calibration:

Internal Calibration:

Manual Adjustment with Internal weight:

[][]Press menu button and then press scroll down to go to ‘ADVANCED’ option.
[][]Select ‘ADVANCED’ by pressing Enter button.
[][]Press scroll down button once to select ‘CAL’ option by pressing Enter button.
[][]Then select ‘ADJ. INT’ using scroll down button and then press Enter button.
[][]Press cancel (C) twice and save the settings if required by scrolling down button and press Enter button and then return to its main menu.
[][]Unload weighing pan Press and hold calibration button to execute ‘Internal Adjustment’.
[][]The balance adjusts itself automatically. The adjusting is finished when the message “ADJ.DONE” appears briefly on the display. The balance returns to the last active application and is ready for operation.
[][]After adjustment, the result of the calibration will be printed out automatically.

External Calibration:

Manual Adjustment with External weight:

[][]Follow the previous instruction[Manual Adjustment with Internal weight] for manual adjustment.
[][]Select ‘ADJ. EXT’ by using scroll down and then press Enter button.
[][]Enter the adjustment weight (200g) by using -/+ key for External Calibration and press Enter button.
[][]Then press cancel (C) button twice and save the settings if required by scrolling down button and press Enter button and then return to its main menu.
[][]Unload weighing pan Press and hold calibration button to execute ‘External Adjustment’.
[][]The required predefined adjustment weight value flashes on the display.
[][]Place adjustment certified weight on the center of pan. The balance adjusts itself automatically.
[][]When ‘0.0000 g’ flashes, remove the adjustment weight.
[][]The adjustment is finished when the message ‘ADJ DONE’ appears briefly on the display. The balance returns to the last active application and is ready for operation.

Eccentricity:

[][]Take 50 g, 150 g of certified weight and clean it with a soft cloth.
[][]Use Tare button to tare the balance before start with a weighing.
[][]Always Press button to tare the balance between the interval of one weight to another and observe whether the instability detector (O) disappears from the left side of the display or not and the balance will give a stability beep sounds.
[][]Place 100 g weight at center, Left Rear, Right Rear, right Front, Left Front and center on the pan again separately.
[][]Allow the reading to be stabilized in each time while weighing and wait until the instability detector disappear from the left side of the display and the stability beep sounds.
[][]Press print button separately to print each individual reading in same print page.

Linearity:

[][]Take 50 g, 150 g of certified weight and clean it with a soft cloth.
[][]Use tare button to tare the balance before start with a weighing.
[][]Always press button to tare the balance between the interval of one weight to another and observe whether the instability detector disappears from the left side of the display or not and the balance will give a stability beep sounds.
[][]Place 20 g, 50 g, 100 g, and 200 g on the center of pan separately.
[][]Allow the reading to be stabilized in each time while weighing and wait until the instability detector (O) disappear from the left side of the display and the stability beep sounds.
[][]Press Print button separately to print each individual reading in same print page.

Sensitivity

[][]Take 50 g, 150 g of certified weight and clean it with a soft cloth.
[][]Use tare button to tare the balance before start with a weighing.
[][]Always press button to tare the balance between the interval of one weight to another and observe whether the instability detector disappears from the left side of the display or not and the balance will give a stability beep sounds.
[][]Place 200 g on the center of pan.
[][]Allow the reading to be stabilized in each time while weighing and wait until the instability detector (O) disappear from the left side of the display and the stability beep sounds.
[][]Press Print button separately to print each individual reading in same print page.

Repeatability (200 g):

[][]Take 50 g, 150 g of certified weight and clean it with a soft cloth.
[][]Use tare button to tare the balance before start with a weighing.
[][]Always press button to tare the balance between the interval of one weight to another and observe whether the instability detector disappears from the left side of the display or not and the balance will give a stability beep sounds.
[][]Place 200 g on the center of the pan for ten times separately.
[][]Allow the reading to be stabilized in each time while weighing and wait until the instability detector (O) disappear from the left side of the display and the stability beep sounds.
[][]Press Print button separately to print each individual reading in same print page.

Repeatability (20 g):

[][]Take 50 g, 150 g of certified weight and clean it with a soft cloth.
[][]Use tare button to tare the balance before start with a weighing.
[][]Always press button to tare the balance between the interval of one weight to another and observe whether the instability detector disappears from the left side of the display or not and the balance will give a stability beep sounds.
[][]Place 20 g on the center of the pan for ten times separately.
[][]Allow the reading to be stabilized in each time while weighing and wait until the instability detector (O) disappear from the left side of the display and the stability beep sounds.
[][]Press Print button separately to print each individual reading in same print page.

Result:

[][]Record all the values for calibration in Calibration Information Sheet for Semi-Micro balance (as per Annexure-III).
[][]Perform the Calibration of the Semi-Micro Balance once in every six months.

Cleaning:

[][]Ensure that no liquid comes into contact with the balance and AC adapter.
[][]Remove all objects from the balance.
[][]Clean the pan with soft brush followed by with soft clean cloth.
[][]Clean all of the parts of the balance with clean dry cloth.
[][]Set the parts of weighing pan carefully.

Annexure:

Annexure-I: Log book for Daily Accuracy Check of Semi-Micro Balance
Annexure-II: Operation Log book for Semi-Micro Balance
Annexure-II: Calibration Information Sheet for Semi-Micro balance

Maintenance of Desiccator; Purpose :

Maintenance of Desiccator; The purpose of this procedure is to describe the maintenance (handling and cleaning) of desiccator.

Scope :

This procedure is applicable for all desiccators in the quality control laboratory of XX Pharmaceuticals Ltd.

Definitions / Abbreviation:

Desiccant canister: A container with hygroscopic substance which induces or sustains a state of dryness in its area.

Responsibilities:

Officer/ Executive, QC

[][] To follow the instructions of this procedure correctly.

Sr. Executive, QC

[][] To ensure that SOP is followed correctly.

Manager, Quality Control

[][] To ensure that this procedure is kept up to date.
[][] To ensure appropriate personnel from the section are trained on this procedure.
[][] To confirm that SOP is technically sound and reflects the required working practices.

Manager, Quality Assurance

[][]Approval of the SOP.
[][]To ensure the overall implementation of the SOP.

Procedure:

Precaution(s):

[][]Do not touch hot samples, while transferring them from Oven/Muffle furnace to desiccator.

Operation

[][]Place about 200 g of silica (desiccant) and/or dessicant canister into the bottom of the desiccator.
[][]Set the sample platform (desiccator plate) to the desiccator.
[][]Apply a smear of grease in between lid & desiccator rim to avoid sticking of lid with the dessicator.
[][]Close the lid properly.
[][]Open the lid to retain the sample to be analyzed and close the lid again.
[][]Remove the sample after required period of time.

Cleaning

[][]Rub the desiccator, sample platform (desiccator plate) and lid with a dry, clean cloth.
[][]Laboratory Attendant will collect the silica (desiccant) to activate (in the oven at about 105°C) and then replace it to the desiccator once in a week or even more frequently when blue color of desiccant turns purple/pink.
[][]Fill up the logbook for desiccant change (as per Annexure-I).
[][]Officer/Executive, QC will check the logbook for proper condition of desiccant or the desiccant change.

Annexure:

Annexure-I: Logbook for desiccant change of desiccator.

Handling of Reference Standard; Purpose :

Handling of Reference Standard; The purpose of this procedure is to provide the instruction for handling of reference standard, impurity standards and standardization & storage of working standard.

Scope :

This procedure is applicable for the management of reference standard and working standard in the quality control laboratory of general block of XX Pharmaceuticals Ltd.

Definitions/Abbreviation:

Chemical Reference Standard:

Primary chemical reference standard is one that is widely acknowledged to have the appropriate qualities within a specified context, and whose value is accepted without requiring comparison to another chemical standard.

Secondary Reference Standard/Working Standard:

A secondary chemical reference standard is a substance whose characteristics are assigned and/or calibrated by comparison with a primary chemical reference standard. The extent of characterization and testing of a secondary chemical reference standard may be less than for a primary chemical reference standard.

[] CRS : Chemical Reference Standard
[] WS : Working Standard
[] USPRS : United States Pharmacopeia Reference Standard
[] BPCRS : British Pharmacopeia Chemical Reference standard
[] ICRS : International Chemical Reference Standard (WHO)
[] EPCRS: European Pharmacopeia Chemical Reference Standard

Responsibilities:

Officer/Executive, Quality Control

[] Handle reference standard properly according to manufacturer’s certificate of analysis and instruction.
[] To standardize working standard
[] ollow the instructions of this procedure correctly.

Sr. Executive, QC

[] To ensure proper handling & storage of reference standard andworking standard.
[] To keep a track of its use, use before date, current pharmacopoeias reference standard lot number and all the related documents.

Manager, Quality Control

[] To approve WS after verification.
[] To ensure appropriate personnel from the section are trained on this procedure.
[] To confirm that SOP is technically sound and reflects the required working practices.

Head of Quality Assurance

[] To ensure the overall implementation of the SOP.
[] Approval of the SOP.

Procedure:

General Note:

[] Read carefully the label of container before use of CRS.
[] After use sealed properly the CRS.
[] Handle the CRS according to material safety data sheet.
[] Ensure proper storage of CRS and WS.
[] Do not use CRS and WS after expiry.

Handling of Reference Standard:

Use one of the following Reference Standard for analysis of raw materials:
[] Pharmacopoeia Standards
[] Validated Suppliers Standards
[] In-house Reference Standards
[] Ensure that the purity of CRS is equivalent to 99.5% or higher, calculated on the basis of the material in its anhydrous form or free of volatile substances.
[] After receiving of CRS, write down the details in Chemical Reference Standard Details Record (as per Annexure-I).

[]During receiving, check the following points :

[][] Sealing condition (flip off seal for USPRS)
[][] Label on the container
[][] Part No.
[][] Lot No.
[][] Certificate of Analysis with complete information on test method.
[][] Information on optimal storage condition (Temperature and humidity).
[][] Updated material safety data sheet outlining any health hazard associated with the material.

[]Match the lot number of CRS with supplied vial.
[]Preserve all reference standard at 2-80C or according to the label of the container or according to manufacturer’s instruction.
[]Preserve all CRS up to expiry date.

[]Standardization of Working standard:

Determination of Identification:

[][]Use CRS for material identification by IR spectrometry and/or chromatographic methods.
[][]For identification, select a lot of respective raw material, which has been approved recently.
[][]Follow the approved analytical method for identification.
[][]Analyze the physical and chemical test against the reference standard.
[][]Confirm that the result is within specification and prepare the test report in Working Standard Analysis Report (as per Annexure-II).
[][]Use this lot as WS for the next routine analysis.

[]Determination of Assay:

[][]For standardization of WS, select a lot of respective raw material, which has been approved recently.
[][]Standardize this lot against the reference standard.
[][]Perform Water (by KF)/Loss on drying (whichever applicable) in twice as per specification and validated analytical method. The average of two results shall be used to determine the assay value.
[][]If the assay is performed by HPLC inject a blank, five replicate injection of standard solution, one test solution & one end standard. If the assay is performed by UV-Spectrophotometer or Potentiometer, at least analysis two samples. Percent of RSD for peak areas or readings of individual analyses should not be more than 1.0%.
[][]The content should be declared to two digits after decimal point.
[][]Prepare the report in Working Standard Analysis Report as per Annexure-II.
[][]Keep all relevant certificates of analysis, IR spectrum, chromatogram and any data regarding identification, purity and assay.
[][]A history sheet of each Working standards shall be maintained in Working Standard Preparation & Consumption Record (as per Annexure –III).

[]Labeling & Storage of Working Standard:

[][]After analysis kept sample in properly sealed clean and dry amber coloured glass vials/bottles.
[][]Prepare four vials/bottles of each working standard containing about 5 g.
[][]Prepare six vials/bottles of each working standard containing about 4 g in case of moisture sensitive materials.
[][]Affix the label on the WS Vials/bottles as per Annexure IV.
[][]On the opening of the vials/bottles, mention the date of opening on label.
[][]In order to maintain the integrity of the working standard, the dispensed vials/bottles have to be kept at the conditions indicated on the vials/bottles label. If the storage condition is 2ºC to 8ºC, store the dispensed vials/bottles in refrigerator with controlled temperature monitoring system and if the storage condition is recommended as room temperature, store the vials/bottles in a desiccator

[]Validity/Shelf Life and Consumption of Working Standard:

[][]Before preparation of working standard ensures that the manufacturer’s shelf life of respective material is valid up to more than one year.
[][]Use the working standard within one year from the date of standardization.
[][]Use the working standard of moisture sensitive material within two months from the date of opening.
[][]Use the working standard of non moisture sensitive materials within three months from the date of opening.
[][]Before use, keep refrigerated vials in a desiccator to reach at room temperature. After use seal the vial/bottle properly and store as per recommended storage condition.

[]Reference numbering system of Working standard:

[][]Assign working standard reference number in following way:
[][]Put first two letters of working standard i.e. WS.
[][]Put a hyphen (-) after the abbreviation, then a serial number of four digits i.e. 0001, again put a slash and then two digits of month i.e. 01 for January.
[][]Again put a slash (/) and then last two digits of the year i.e. XX for year 20XX.
[][]For example, First working standard prepare on January 20XX will get the Lab. Control No. WS-0001/01/XX

Discard Procedure of CRS & WS:

[][]At the time of issuing a new vial/bottle, the old/used vial/bottle shall be destroyed in following manner:
[][]Empty the contents in waste beaker containing previously prepared 0.4% sodium hypochlorite solution. Shake the dispersion of sample in container with the help of a glass rod and leave it for at least 12 hours. Then neutralize the liquid (pH 6-9) by acid/alkali and dilute the liquid 10 to 20% by fresh water and drain out slowly into designated place and clean the drain with adequate water flushing.
[][]Deface the label of the vial/bottle.
[][]Discard the vial/bottle into the specific container as broken glassware. Record the destruction details in Chemical Reference Details Record (as per Annexure-I) for CRS, and Working Standard Preparation & Consumption Record for WS (as per Annexure-III).

Annexure:

Annexure-I: Chemical Reference Standard Details Record
Annexure-II: Working Standard Analysis Report
Annexure-III: Working Standard Preparation & Consumption Record
Annexure-IV: Label of Working Standard

Calibration of Glassware: Purpose

Calibration of Glassware; The purpose of this SOP is to ensure that all glass wares are properly handled, thoroughly cleaned and calibrated accurately before use.

Scope:

This procedure is applicable for glassware handling, washing and calibration used in the different analysis of quality control laboratory and microbiology laboratory of general block of XX Pharmaceuticals Ltd.

Definitions/Abbreviation:

[] ASTM: American Society for Testing and Materials
[] SOP   : Standard Operating Procedure

Responsibilities:

[] Officer/Executive/Sr. Executive, Quality Control
[] To ensure that this procedure is followed.
[] To maintain the records properly as per SOP.

Manager, Quality Control

[] To ensure that this procedure is kept up to date.
[] To confirm that the SOP is technically sound and reflects the required working practices.
[] To arrange training on the SOP to all concerned personnel and to ensure implementation of the SOP after training.
[] Schedule calibration of the instrument at the defined intervals.

Head of Quality Assurance

[] Approval of the SOP.
[] To ensure the overall implementation of the SOP.

Procedure:

Precaution(s):

[] Handle with care during cleaning of Glassware.
[] Before discard of glassware, observe the label on glassware and handle with care as the type of chemical.
[] Wear gloves, mask and protective clothing during glassware handling and cleaning.
[] Do not use laboratory glassware for drinking purpose.
[] Do not handle the hot glassware without heat resistant gloves.
[] Do not put the hot glassware on cold or wet surface or cold glassware on hot surface.
[] Avoid to heat glassware that is etched, cracked, chipped, nicked or scratched.
[] Do not heat directly thin glassware with flaming.
[] Never place the glassware from the freezer into warm water baths.

Handling Procedure:

[] Hold the beakers, bottles, flask the side and bottoms rather than by the tops.
[] Avoid over tighten the clumps.
[] Use always coated clumps to avoid breakage while the clumping glassware.
[] Cool the glassware slowly to prevent breakage.
[] Dispose the broken glass into specific waste bucket.
[] Keep all cleaned glassware at designated place.

Washing Procedure:

[] Transfer all used glassware to washing area.
[] Discard the solution from glassware into a designated container/place.
[] Rinse initially all glassware with sufficient potable water for removal the residual content of solution.
[] For pipette, pass sufficient potable water through the pipette by force at two or three times.
[] Wipe to remove the label with detergent powder or suitable solution.
[] Allow to soak the glassware with diluted detergent for 10-15 minutes to remove any contaminants.
[] Rinse the glassware with sufficient potable water until detergent is removed.
[] Finally rinse with purified water for two or three times for removal any contaminating substances that may be present in the potable water.
[] Discard the rinsing solution.
[] Place cleaned glassware into Glassware drying rack for removal of residual water from glassware.
[] Dry the glassware for QC analysis and sterilize the glassware at 200°C for 1 hour for use in Microbiological analysis.

Calibration Procedure:

Burette Calibration:

[] Take a burette and inspect to ensure smooth tap operation.
[] Observe the tip of the burette, ensure no cracks or chips.
[] Observe markings on burette which is legible.
[] Rinse the burette at several times with purified water.
[] Fill the glassware up to the mark.
[] Dispense into a pre-tarred 100 ml beaker.
[] Record final volume.
[] Record mass of water.
[] Repeat the same procedure for another two times.
[] Calculate the volume delivered from the equation below using recoded weight and density of water at the temperature of calibration.  Take Tabulated Density of water at the temperature of calibration from the Annexure-II.
Volume of Burette= Weight/Tabulated Density of water at the temperature of calibration
[] Record calculated volumes, determine mean and compare the volume with that read from the burette and then determine the error as per Annexure – I.

Limit of error of the calculated volume should be as per following table (as per ASTM E-287)

Calibration of Pipette:

[] Take purified water into a beaker.
[] Record the temperature of the water used.
[] Weigh and tare another 100 ml beaker.
[] Dispense water as per pipette volume into tarred beaker.
[] Record the weight of purified water.
[] Repeat the same procedure for another two times.
[] Calculate the volume delivered from the equation below using recoded weight and density of water at the temperature of calibration.  Take Tabulated Density of water at the temperature of calibration from the Annexure-II.
Volume of Pipette= Weight/Tabulated Density of water at the temperature of calibration
[] Record calculated volumes, determine mean and compare the volume with the nominal volume and then determine the error as per Annexure – I.

Limit of error of the calculated volume should be as per following table (as per ASTM E-969)-

Calibration of Volumetric Flask:

[] Observe the volumetric flask, ensure no cracks or chips.
[] Observe markings on volumetric flask, ensure they are legible.
[] Rinse volumetric flask at several times with purified water.
[] Rinse with acetone and air dry.
[] Tare volumetric flask on balance.
[] Add purified water and fill to mark.
[] Record weight of water.
[] Record the temperature of the water used.
[] Repeat the same procedure  for another two times
[] Calculate the volume delivered from the equation below using recoded weight and density of water at the temperature of calibration.  Take Tabulated Density of water at the temperature of calibration from the Annexure-II.

[] [] Volume of Volumetric Flask= Weight/   Tabulated Density of water at the temperature of calibration

Record calculated volumes, determine mean and compare the volume with the nominal volume and then determine the error as per Annexure – I.

Limit of error of the calculated volume should be as per following table (as per ASTM E-288)

Download All Annexure

Annexure I : Glassware Calibration Record
Annexure II : Density of Water