How to Read a Peptide Certificate of Analysis

Research laboratory materials

A Certificate of Analysis should be read as a lot-specific record, not as a general marketing statement. Confirm first that the document matches the catalog item and shipped lot.

COA review checklist

  • Unambiguous material name and catalog identifier
  • Lot or batch number
  • Document source and test date
  • Method for each reported attribute
  • Acceptance criteria, numerical results, and units
  • Authorized release information or document version
  • Links to original analytical files where available

Do not combine separate attributes

Molecular identity, chromatographic purity, assay or content, and quantity are separate attributes. Mass spectrometry may support identity; chromatography may characterize a purity or impurity profile; quantitative content requires an appropriate value-assignment or assay method. A single “99% purity” statement does not prove the amount in a vial or any untested attribute.

Sources

These references are educational and do not imply FDA approval, NIST traceability, or certification of BioVector or any lot.

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