Peptidology
Education library

Learn the lab fundamentals

Read the documentation before you read the marketing. COAs, analytical methods, sterility testing, and what Research Use Only actually means.

19 guides · 5 topics · Analytical methods · Research Use Only — not for human or animal consumption.

Peptidology is US-operated; guides may emphasize FDA context — local rules differ.

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Showing 3 of 19 guides

Colorful liquid samples in test tubes held in a laboratory rack.
Analytical methods

HPLC vs. Mass Spectrometry

Two different questions: how pure is it, and is it the right molecule? Why a complete COA usually needs both.

Updated 2026-05-22

Abstract blue wave pattern representing analytical data.
Analytical methods

Understanding HPLC Chromatograms on a COA

Chromatogram screenshots appear on many COAs but are rarely explained. How to read peaks, baselines, and what a clean run looks like.

Updated 2026-06-07

Colorful molecular model illustrating peptide structure.
Analytical methods

Identity Testing: Why Peptide Sequence Matters

Purity without identity confirmation is an incomplete picture. How labs verify sequence, and what to look for on a COA.

Updated 2026-06-07