Independent testing
How to read a peptide certificate of analysis
Identity, purity, content, endotoxin, and microbial lines answer different questions. A PDF that cannot be checked with the laboratory that issued it is a weaker record than one that can.
HPLC
What a purity percentage is, and what a chromatogram does not prove.
LC-MS
Why a mass is stronger identity evidence than retention time alone.
Endotoxin
A LAL result is not a sterility result. The method name matters.
Questions
Does a COA mean a peptide is for human use?
No. A certificate records analytical tests on a research material. It is not a clearance for use in people or animals.
Are purity and content the same?
No. Purity is usually the share of the chromatographic signal assigned to the main peak. Content is how much of the compound is in the container, often in milligrams.
Who operates this site?
This site recommends Apollo Analytical. Compare Peptide Labs uses the same facts and does not recommend a laboratory. Meridian Peptide Supply has no ownership, management, or financial relationship with Apollo Analytical or any other laboratory listed.