Labs are used to business customers. You may be the first private buyer they meet. These pieces translate both directions.
The labs best equipped to test your peptide are the ones least able to accept it. Accreditation, certification and liability all bite the moment a private person asks for a result. That is not a scandal. It is how this market is built.
Read on → Last updated: 9 July 2026 BackgroundWhen peptides are made, organic solvents and other residues can stay in the powder. These are checked with special methods like gas chromatography, and the limits are set by the ICH Q3C guideline. A single purity number says nothing about this.
Read on → BackgroundHPLC separates a peptide mixture by hydrophobicity and measures the UV absorption of each component. Purity as area% indicates how much of the total detected area falls on the main peak - nothing more.
Read on → BackgroundFor peptides, LC-MS is the standard approach: liquid chromatography separates, mass spectrometry weighs. GC-MS needs volatile substances - intact peptides aren't. A COA tells you what was measured - but only for that exact sample.
Read on → BackgroundPurity and identity say nothing about microbiological safety. Endotoxin and sterility tests are separate checks that are crucial for injectable peptides.
Read on → BackgroundAn HPLC purity certificate only tells you how much of a substance is in the sample - not what that substance is. To confirm its identity, you need mass spectrometry, which checks the molecular mass or the amino acid sequence.
Read on → BackgroundA single purity number isn't an absolute property of the peptide - it's the result of a specific measurement method. It only answers one of three quality questions - and without details on method, wavelength, and date, it's analytically incomplete, easy to fake, and says nothing about identity, mass, safety, or sterility.
Read on → BackgroundPurity tells you how large the share of the target peptide is among all detectable components - not how many milligrams are actually inside. The content (assay) measures the absolute amount of active peptide, for example in milligrams. So a vial can be highly pure but still contain less active ingredient than the fill weight suggests.
Read on → How-toWant to get a peptide sample tested? First, clarify four questions: identity, purity, content, and safety. The more methods you choose, the more you learn - but it costs more and takes longer. A result always applies only to the exact sample you submitted.
Read on → BackgroundA single purity and identity test typically costs $150-800 per sample, while a more comprehensive panel runs $800-2,500 or more. The price depends on the number of methods, accreditation, turnaround time, and sample size. Unusually cheap tests are a red flag.
Read on → BackgroundForged certificates of analysis exist because a fake is far cheaper than a real test, and buyers reward the green number. This guide explains the economics, the broad categories of forgery, the tells that protect a buyer, and why issuer-side verification breaks the business model.
Read on → Last updated: 8 July 2026 How-toA certificate of analysis reports what a lab found in one sample: whether it is the right substance, how pure it is, and how much active ingredient it holds. The single most useful check is whether the certificate can be verified with the issuing lab - if it cannot, treat the numbers as a claim, not a fact.
Read on → Last updated: 8 July 2026 How-toYou do not need to be a business to have a peptide tested. Several independent labs accept a single vial from a private buyer, run the analysis, and send you a certificate. This guide covers which test to choose, what it costs, how to ship a sample, and how long it takes.
Read on → Last updated: 8 July 2026
