Guides
Peptide lab report guides
How to read the paperwork behind a research peptide: what a certificate of analysis (COA) should show, what each test measures, and how to tie a report to the vial in your hands.
What a COA is, how purity is tested, and ten checks for any report.
What a peptide purity test measures: how HPLC works, what the percentage on a COA means, what it doesn't tell you, and how to read a chromatogram. Research use only.
How mass spectrometry (MS and LC-MS) confirms a peptide's identity on a lab report: expected vs observed mass, charge states, and what a matching mass does and doesn't prove.
What net peptide content means on a COA, how it differs from purity and from the label strength, why it can read above or below the label, and what tolerance to look for.
What a peptide lot (batch) number is, where to find it on the vial, how to look up the lab report for it, and why a report only counts for the lot it names.
How to tell whether a peptide certificate of analysis is genuine: confirm the lab, look the report up, match the lot and strength, and spot signs of an edited or reused report.
Ten checks for any research peptide vendor before you order: published prices, lot-numbered lab reports, a batch lookup, a contactable lab, clear shipping and terms, and research-use labeling.
How to work out and compare price per milligram for research peptides across vial sizes and multi-packs, and why measured net content and shipping change the real figure.
How freeze-dried (lyophilized) research peptides are usually stored before use: cold, dry and dark, sealed, with as few temperature swings as possible, and the expiry date on the label.