Laboratory guides for peptide research
Peptide Certify is an independent reference for peptide documentation: how certified peptides are synthesized, purified, characterized, reconstituted, and how to research the vendors who supply them. We sell nothing and take no affiliate placements — every article is research-reference content only.
Read the Certified Peptides GuideSynthesis & Purification
Solid-phase synthesis, prep HPLC, reverse-phase and normal-phase chromatography, stationary phases.
Explore synthesis →Characterization & Testing
Analytical HPLC, mass spectrometry, mass calculators, and reading a COA field by field.
Explore testing →Reconstitution & Calculators
Lyophilized peptide reconstitution, solvent selection, and molar concentration mathematics.
Explore reconstitution →Vendor Public Research
Independent summaries of public vendor information: COA credibility, third-party tests, red flags.
Explore vendor research →What "certified" actually means
A certified peptide is one whose identity, purity, and content are supported by verifiable analytical evidence — a batch-specific certificate of analysis, an HPLC chromatogram, a mass-spectrometry confirmation, and ideally an independent third-party retest. The certificate, not the vial, is the product. Our complete guide teaches you to read that documentation critically: what each field proves, which methods are meaningful, and which claims are marketing in a lab coat.
Popular references
- How a peptide mass calculator works — and how to use one to audit a COA
- Prep HPLC for peptide purification — the workhorse method, end to end
- How to reconstitute lyophilized peptides — laboratory protocol and arithmetic
- Peptide concentration calculation — molarity, content correction, dilutions
- Bacteriostatic water for lab use — what the preservative does and when it matters
- Mass spectrometry for peptide characterization — the identity backbone