Analytical method validation. Presented by Debbie Parker 4 July, 2016
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1 Analytical method validation Presented by Debbie Parker 4 July, 2016
2 Introduction This session will cover: Guidance and references The types of test methods Validation requirements Summary Slide 2 PharmOut 2015
3 References ICH Q2(R1) Validation of Analytical procedures: Text and Methodology FDA Guidance for Industry Analytical Procedures and Methods Validation for Drugs and Biologics July 2015 FDA Guidance for Industry - Q2B Validation of Analytical Procedures: Methodology FDA CDER reviewer guideline for validation of chromatographic methods (1994) WHO TRS 937 Appendix 4 Analytical Method Validation 2006 ICH Q2(R1) 2005 Compendia General Chapters Slide 3 PharmOut 2015
4 Recent changes FDA has just released a new guidance document: Analytical Procedures and Methods Validation for Drugs and Biologics, Guidance for Industry, July 2015 Supersedes the draft document (same name) published Feb 2014 Replaces: Analytical Procedures and Methods Validation, 2000 Slide 4 PharmOut 2015
5 New guidance Method content Principle/ Scope Apparatus/Equipment Operating parameters Reagents/Standards Sample preparation Standards/Control Solution preparation Procedure System Suitability Calculations Data reporting Slide 5 PharmOut 2015
6 New Guidance - Reagents / Standards Grade of chemical (e.g., USP/NF, American Chemical Society, High 157 Performance or Pressure Liquid Chromatography, or Gas 158 Chromatography and preservative-free) Source (e.g., USP reference standard, qualified in-house reference material, 160 WHO International Standard/Reference Material, CBER standard) Purity (for pure chemicals only), State (e.g., dried, undried), and concentration Potencies (where required by CFR, USP) Storage conditions Directions for safe use (as per current Safety Data Sheet) Validated or documented shelf life Slide 6 PharmOut 2015
7 Goal The aim of validating an analytical procedure is to demonstrate that it is fit for purpose. Slide 7 PharmOut 2015
8 Types of methods ICH splits into four : Identification tests Impurities - Quantitative (content of) Impurities - Limit (control of) Quantitative tests (API or component(s) in drug substance / product) Slide 8 PharmOut 2015
9 Validation requirements for analytical assays: ICH Q2(R1) Slide 10 PharmOut 2015
10 Validation requirements for analytical assays: ICH Q2(R1) Slide 11 PharmOut 2015
11 Methods to be validated - Identification Identification tests: identify the analyte compare test sample to a standard E.g. Spectrum, chemical reactivity, chromatograph etc. Slide 12 PharmOut 2015
12 Methods to be validated - Impurities Impurities: ensure impurities are as low as required quantitative test or limit test accurate reflection of the purity characteristics validation requirements differ between the two impurity tests Slide 13 PharmOut 2015
13 Methods to be validated - assays Assay: Quantitatively measure the major component(s) in the drug product Validation requirements similar for: Active ingredients Other selected component(s) Other analytical procedures (e.g. dissolution) Slide 14 PharmOut 2015
14 Validation tests The objective of the analytical procedure must be understood to determine which of the validation characteristics will be evaluated. Consider the following characteristics: Accuracy Precision Repeatability Intermediate precision Specificity Detection Limit Quantitation Limit Linearity Range Slide 15 PharmOut 2015
15 Accuracy closeness of the value obtained to the reference ( true ) value determined across the range of the analytical procedure Slide 16 PharmOut 2015
16 Accuracy There are several methods to determine accuracy. Examples: Apply the procedure to an analyte of known purity (reference) Apply the procedure to synthetic mixtures of the drug product components to which known quantities of the drug substance to be analysed have been added Slide 17 PharmOut 2015
17 Precision The precision of a procedure is the closeness of a series of measurements from different sampling of the same homogenous sample. If a homogenous sample cannot be obtained, use artificially prepared samples or a sample solution. Slide 18 PharmOut 2015
18 Accurate and precise Slide 19 PharmOut 2015
19 Precision There are three levels of precision: Repeatability Intermediate precision Reproducibility Slide 20 PharmOut 2015
20 Repeatability Repeatability uses the same operating conditions over a short interval of time, also called intra-assay precision. Same laboratory One analyst Same day Same equipment Slide 21 PharmOut 2015
21 Repeatability Repeatability should be assessed using either: A minimum of 9 determinations covering the specified range (e.g. 3 concentrations/3 replicates) A minimum of 6 determinations at 100% of the test concentration Slide 22 PharmOut 2015
22 Intermediate precision Intermediate precision assesses the variation within laboratories: Same laboratory Multiple days Multiple analysts Different equipment Slide 23 PharmOut 2015
23 Reproducibility assesses the precision between laboratories; it is an interlaboratory trial should be considered when standardising methodology e.g. for inclusion in pharmacopoeias or collaborative studies Slide 24 PharmOut 2015
24 Specificity Specificity should be investigated for the validation of: Identification tests Ensure the identity of an analyte Purity tests Demonstrate accurate content of impurities of an analyte Assay (content or potency) Provide accurate content or potency of the analyte in a given sample Slide 25 PharmOut 2015
25 Specificity Identity, impurities and assay tests ability to detect the analyte in a sample in the presence of other components which may also be present. may not always be able to demonstrate that an analytical procedure is specific for a particular analyte (complete discrimination). Use two or more procedures to achieve the required discrimination. Slide 26 PharmOut 2015
26 Specificity Identification test Should be able to discriminate between compounds of related structures which may be present. Use scientific judgement to choose potential interfering materials. Typically would confirm discrimination by obtaining: positive results from samples with the analyte negative results from samples without the analyte Slide 27 PharmOut 2015
27 Detection limit The lowest amount of analyte in a sample that can be detected is the detection limit. Not necessarily quantified as an exact value. Slide 28 PharmOut 2015
28 Quantitation limit The quantitation limit is the lowest amount of analyte that can be quantitatively determined with acceptable precision and accuracy. The quantitation limit is typically required for impurities and/or degradation product determinations. Slide 29 PharmOut 2015
29 Linearity Ability to obtain results that are directly proportional to the concentration of an analyte in the sample. A minimum of 5 concentrations should be used to establish linearity. May demonstrate linearity directly on the drug substance (dilution of a standard stock solution). Slide 30 PharmOut 2015
30 Range determined by confirming that the procedure provides an acceptable degree of linearity, accuracy and precision. use amounts of analyte within or at the extremes of the specified range of the procedure being validated. Slide 31 PharmOut 2015
31 Range Consider the following minimum specified ranges: Assay for drug substance or finished product percent of the test concentration Content uniformity percent of the test concentration Dissolution testing +/- 20 percent over the specified range Slide 32 PharmOut 2015
32 Robustness ability to remain unaffected by small, deliberate variations in method parameters provides an indication of the reliability of the method during routine use usually only for method development phase; if not done then, it should be done during method validation Slide 33 PharmOut 2015
33 Robustness Examples of typical variations: Stability of solutions Temperature / humidity MP flow rate, ph, composition Different columns for chromatography tests (lots/suppliers) Slide 34 PharmOut 2015
34 Validation requirements for analytical assays: ICH Q2(R1) Slide 35 PharmOut 2015
35 System suitability testing (SST) based on the concept that the equipment, electronics, analytical operations and samples to be analysed constitute an integral system SST parameters for a particular procedure depend on the type of procedure being validated. Refer to Pharmacopoeias for more information. Reference: ICH Q2(R1) Slide 36 PharmOut 2015
36 Re-validation of methods What situations will require re-validation of an analytical test? Slide 38 PharmOut 2015
37 Re-validation of methods May be required in the following situations: Changes in the synthesis of the drug substance Finished product composition has changed Testing procedure has changed Slide 39 PharmOut 2015
38 Method validation report Complete a validation report once validation protocol has been executed. The report should have enough detail to be reviewed without the need for raw data. Must be linked to the protocol (reference protocol number). Report should have clear conclusions supported by data. Deviations should be reported and explained. Slide 45 PharmOut 2015
39 Sample verification report Slide 46 PharmOut 2015
40 Summary The aim of validating an analytical procedure is to demonstrate that it is fit for purpose. The objective of the analytical procedure must be understood to determine which of the validation characteristics need to be evaluated. Method validation must be documented, reviewed and approved. Slide 47 PharmOut 2015
41 Thank you for your time. Questions? Debbie Parker Senior Consultant Slide 48 PharmOut 2015
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