Home Blog Reading the paperwork
Reading the paperwork
What each line on a certificate measures, and what a weak one leaves out.
- Reading the paperworkReading a chromatogramOne peak is the answer everyone wants. What the shoulders, the late cluster and the flat stretch before it are telling you.
- Reading the paperworkWhy we pay for a second laboratoryThe manufacturer tests its own material at release. That is normal, necessary, and the one party with an interest in the answer.
- Reading the paperworkHow to read a certificate of analysisWhat each line on a COA is actually measuring, in the order it matters, and the four things a weak certificate leaves out.
- Reading the paperworkWhat a blend is, and what its certificate should saySeveral peptides co-lyophilized into one vial is one lot number and several different purity questions.
- Reading the paperworkNet peptide content, and the 18% error nobody catchesWhy the milligrams on the label are not the milligrams of peptide, and what that does to a concentration you already wrote down.
- Reading the paperworkWhat a lot number is forThe FDA has documented batch numbers being rewritten a tier upstream. Here is what that means for the document in your hand.
- Reading the paperworkPurity is not potencyHPLC, mass spectrometry and Karl Fischer each answer a different question. Three suppliers quoting "99%" may be quoting three different things.
Other shelves
- How it is madeWhere a peptide comes from, and where the cost of a long chain actually goes.4 pieces
- FormatsVials, sprays and strips: what changes between them and what does not.1 piece
- HandlingStorage, stability and the arithmetic of a stock solution.2 pieces
- Where the line isWhat this site will and will not say about the material it sells, and why.1 piece
Nothing here is medical advice. Everything on this site is supplied for laboratory research use only.