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