Certificates of analysis published in full and tied to a specific lot — purity, identity, method, mass and date. Search by batch number to pull the certificate that belongs to a vial in front of you.
The full batch archive — every certificate, every lot, searchable and verifiable — is maintained at BiometrixLabs. Each certificate carries the compound, the lot number, the analytical method, the measured purity, the identity confirmation and the date of analysis.
Five fields separate a certificate from a graphic. If any of these is missing from a document you have been handed, the document is not evidence of anything.
Tied to the specific batch the vial came from. A certificate with no lot number cannot be matched to anything and proves nothing about what you are holding.
Reversed-phase HPLC, with the column, gradient and detection wavelength stated. A purity number with no method behind it is an assertion.
Mass spectrometry showing the observed mass against the theoretical mass. Purity says how much of one thing is present. Only identity says which thing.
Not just the integrated number — the trace. Peak shape and baseline tell you whether the integration was reasonable.
The date of analysis and the laboratory that performed it. An undated certificate from an unnamed lab is a design exercise.
Often omitted. A vial can be 99% pure and still contain less peptide than labelled, because lyophilised material carries counterion and residual water.
A plain-language walkthrough of what an HPLC chromatogram actually tells you, what a mass-spec identity confirmation proves, and the five things most certificates leave out.
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