Two Certificates, One Batch, Two Different Numbers
Same batch, two laboratories, two different purity figures. No analyst blundered. The spread opened up because a purity percentage is the output of a procedure…
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Same batch, two laboratories, two different purity figures. No analyst blundered. The spread opened up because a purity percentage is the output of a procedure…
A bump riding on the side of the main peak, never quite resolving into anything of its own, is the most informative feature a chromatogram is likely to hand you.
Scroll any peptide supplier's homepage and "third-party tested" is almost certain to appear somewhere on it. As a phrase on its own it settles nothing.
Almost nothing a peptide supplier says about itself can be checked from the outside. What can be checked is the paperwork…
Every research peptide raises two separate analytical questions. Is this actually the molecule it is supposed to be?
A certificate of analysis is what stands between a characterized research compound and an unidentified powder in a vial. It is also the document most buyers scroll past.
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