Two analytical techniques do most of the work behind a research peptide's documentation. They answer different questions, and the strongest documentation uses both.
HPLC — the purity question
High-Performance Liquid Chromatography separates a sample into its components so the target compound can be measured against impurities. Its output is a purity percentage — for example, ≥98%.
Mass spectrometry — the identity question
Mass spectrometry measures the molecular mass of the compound, confirming that the material is what it claims to be. Where HPLC tells you how pure, mass spec tells you whether it's the right molecule.
Why both matter
A high purity figure on the wrong compound is meaningless, and the correct compound at low purity isn't research-grade. A batch-specific COA that reports both a measured purity and an identity confirmation is what supports confident receiving.
Research Use Only. V8 Peptides products are supplied strictly for laboratory research and development and are not intended for human or veterinary use, consumption, or any therapeutic or diagnostic purpose.