August 22, 2026

Reading a Certificate of Analysis

Start with identity and traceability

Confirm that the material name, lot or batch identifier, report number, and testing date correspond to the product being reviewed. A report that cannot be tied to a specific lot should not be treated as batch-specific documentation.

Review the analytical method

Identify the method used, the laboratory that performed the work, and whether the report describes sample preparation and acceptance criteria. Different methods answer different analytical questions.

Read results with their limitations

Distinguish measured findings from specifications, estimates, or marketing language. Check units, detection limits, chromatograms, signatures, and any qualifying notes before drawing conclusions.