Common peptide testing methods in research laboratories are used to confirm identity, assess purity, and check consistency across batches. A typical workflow may include:
- HPLC to evaluate purity and detect related impurities or truncated species
- Mass spectrometry to confirm molecular mass and support identity verification
- UV analysis for routine concentration or sample characterization in some workflows
- Amino acid analysis when composition confirmation is needed
HPLC and mass spectrometry are often considered the core methods because they provide complementary information: one focuses on chromatographic purity, while the other supports molecular confirmation. Laboratories may also review the Certificate of Analysis (COA) for method summaries, acceptance criteria, and reported results.
When comparing results, it is important to consider sample preparation, instrument settings, and reference standards, since these can affect interpretation. Research peptides should be handled according to lab SOPs and used only for research use only; they are not intended for human consumption.