Peptency Academy · Section
Testing and quality
What each laboratory test answers, how it works and how to read a certificate of analysis.
Testing and qualityAcademyTesting4 pages
Pages
- TestingHow to read a peptide CoA, line by line, with red flagsWhat each line of a peptide certificate of analysis measures (identity, purity, content, counterion, water, endotoxin, lab) and ten red flags, each tied to a source.
- TestingHPLC purity explainedHPLC purity is the main peak's share of UV peak area, not the share of peptide in the powder. How the test works, what it misses, published checks, with sources.
- TestingPurity is not content: what a peptide powder is made ofHPLC purity is a share of chromatogram peak area. Peptide content is a share of the powder's mass. How counterions and water make the two differ, with sources.
- TestingThe four questions a peptide CoA must answerIdentity, purity, content and contaminants: the four questions a peptide certificate of analysis must answer, which test answers each, with a sourced worked example.
Research-use information. This library summarises published literature and regulator records. It is not guidance for use, not medical advice, and not a statement that any material is suitable for use in people or animals.