Analytics
Testing methodology
How identity and purity concepts appear in research-material documentation. Method details on a given lot always defer to that lot’s certificate.
Identity
Identity testing asks whether analytical evidence is consistent with the expected compound. Mass spectrometry is commonly used for this purpose in peptide and related research-material workflows. Results should be read with the method context provided on the certificate.
Purity
Purity testing estimates the relative abundance of the primary analyte under defined chromatographic conditions. HPLC is a common technique. Reported percentages are method-dependent and lot- specific.
Third-party laboratories
When lots are tested by independent laboratories, batch pages should identify the testing context available for that release. PEPerchini Scientific does not invent laboratory names, accreditation seals, or results that are not in the lot record.
Learn more
- HPLC testing explained
- LC-MS identity testing explained
- Understanding Certificates of Analysis
- Quality standards
- NIST measurement resources (external; no endorsement implied)
- USP impurities resources (external; no endorsement implied)
Research Use Only. Testing literacy content is for laboratory documentation review, not clinical interpretation.