Standard Operating Procedure for Bench-Top Stability Evaluation of Analyte in BA/BE Studies
| Department | BA-BE Studies |
|---|---|
| SOP No. | SOP/BA-BE/177/2025 |
| Supersedes | SOP/BA-BE/177/2022 |
| Page No. | Page 1 of 9 |
| Issue Date | 17/04/2025 |
| Effective Date | 20/04/2025 |
| Review Date | 17/04/2026 |
1. Purpose
To define the procedure for evaluating bench-top stability of analytes in plasma under ambient temperature conditions during sample preparation and handling, in support of bioavailability/bioequivalence (BA/BE) studies.
2. Scope
This SOP applies to all bench-top stability evaluations carried out in the bioanalytical laboratory for plasma samples prepared for BA/BE studies and stored at ambient conditions prior to processing.
3.
Responsibilities
- Analyst: Prepares, labels, exposes, and analyzes stability samples.
- Supervisor: Reviews data and ensures compliance with method validation requirements.
- QA: Ensures all documentation is accurate and conforms to regulatory standards.
4. Accountability
The Bioanalytical Laboratory Manager is accountable for ensuring that bench-top stability evaluations are properly planned, conducted, and documented in compliance with ICH M10 and US FDA guidelines.
5. Procedure
5.1 Sample Preparation
- Prepare at least six replicates of Low QC (LQC) and High QC (HQC) samples using validated bioanalytical methods.
- Label each tube with:
- Sample ID
- QC level
- Date and time of preparation
- Bench-top exposure start time
- Document details in Annexure-1: Bench-Top Stability Log.
5.2 Exposure Conditions
- Place labeled samples on the laboratory bench at ambient temperature (20–25°C).
- Expose samples for a pre-defined period (e.g., 4, 6, 8, 24 hours) as per method validation protocol.
- Do not allow exposure beyond validated time frame.
- Return exposed samples to freezer (-20°C or -70°C) until ready for analysis.
5.3 Sample Analysis
- Analyze the bench-top exposed samples with a fresh calibration curve and system suitability checks.
- Use validated LC-MS/MS method for quantification of analyte.
- Compare the measured concentrations to nominal concentrations of LQC and HQC.
5.4 Acceptance Criteria
- Mean measured concentration should be within ±15% of the nominal value.
- Coefficient of variation (%CV) should be ≤15%.
- Summarize results in Annexure-2: Bench-Top Stability Summary.
5.5 Documentation and Reporting
- Compile data, calculations, chromatograms, and system suitability results.
- Prepare a final report and submit to QA for review and archival.
- Incorporate approved summary in method validation report or study report.
6. Abbreviations
- BA/BE: Bioavailability/Bioequivalence
- LQC: Low Quality Control
- HQC: High Quality Control
- %CV: Percent Coefficient of Variation
- QA: Quality Assurance
7. Documents
- Bench-Top Stability Log – Annexure-1
- Bench-Top Stability Summary – Annexure-2
8. References
- ICH M10: Bioanalytical Method Validation
- US FDA Guidance for Industry: Bioanalytical Method Validation (2022)
- Internal Method Validation Protocol
9. SOP Version
Version: 2.0
10. Approval Section
| Prepared By | Checked By | Approved By | |
|---|---|---|---|
| Signature | |||
| Date | |||
| Name | |||
| Designation | |||
| Department |
11. Annexures
Annexure-1: Bench-Top Stability Log
| Sample ID | QC Level | Prep Date | Start Time | End Time | Exposed By |
|---|---|---|---|---|---|
| BE177-BT-01 | LQC | 16/04/2025 | 09:00 | 15:00 | Sunita Reddy |
Annexure-2: Bench-Top Stability Summary
| QC Level | Nominal (ng/mL) | Mean Measured | %CV | % Difference | Status |
|---|---|---|---|---|---|
| LQC | 20.0 | 19.3 | 4.9 | -3.5% | Accepted |
| HQC | 1500.0 | 1512.4 | 2.6 | +0.8% | Accepted |
Revision History:
| Revision Date | Revision No. | Details | Reason | Approved By |
|---|---|---|---|---|
| 01/01/2022 | 1.0 | Initial release | New SOP | QA Head |
| 17/04/2025 | 2.0 | Updated exposure durations, added annexures | ICH M10 Alignment | QA Head |