Certificate of Analysis (COA)¶
Definition¶
A Certificate of Analysis (COA) is an official document issued by the manufacturer that reports the quality testing results for a specific batch of a product. For peptides, it includes purity, identity, and other quality data.
Overview¶
The COA is the most important quality document for research peptides. It provides batch-specific evidence that the product meets its stated specifications. Every batch of RPL Peptide products is tested and accompanied by a COA.
Technical Explanation¶
COA Components:
| Section | Information Provided |
|---|---|
| Product Information | Product name, catalog number, batch/lot number |
| Manufacturer Details | Company name, facility location |
| Testing Methods | HPLC, MS, appearance, pH, etc. |
| Test Results | Purity (%), identity confirmation, appearance |
| Specifications | Acceptance criteria for each test |
| Analytical Data | HPLC chromatogram, mass spectrum |
| Certifying Signature | Authorized QC signatory |
Verification Workflow: 1. Check batch number matches product packaging 2. Confirm test results meet specifications 3. Review HPLC chromatogram for clean profile 4. Verify MS data confirms molecular weight 5. Check document authenticity (watermark, digital signature)
Importance in Peptide Documentation¶
The COA is the primary quality assurance document for peptide procurement. Researchers should always verify that the COA matches the product received. A comprehensive COA demonstrates the manufacturer's commitment to quality.
Related Terms¶
Frequently Asked Questions¶
Q: Should every product shipment include a COA? A: Yes. Each batch/lot should have its own COA reflecting the actual testing of that specific batch. Generic COAs are not acceptable for quality verification.
Q: What should I verify first on a COA? A: First, confirm the batch/lot number matches the product label. Then check that the purity meets the minimum specification (e.g., ≥98%). Finally, verify the molecular weight matches the expected value.