Current turnaround: 21 days from receipt of your samples. Due to high demand, HPLC-UV peptide testing and Certificates of Analysis are taking longer than usual.

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Analytical resources

Reference material on how peptides are tested, what a Certificate of Analysis can and cannot tell you, and how to check that the one in your hand was issued by the laboratory named on it. Written by the analysts who run the tests.

Start here Peptide Testing: How Purity and Identity Are Actually Measured The complete reference on how a peptide is tested, what each number on a certificate is measuring, and the questions no purity figure can answer. 11 min read
Certificates How to Read a Peptide Certificate of Analysis, Line by Line A field-by-field walkthrough of a peptide Certificate of Analysis, including the omissions that matter more than anything printed on it. · 9 min read Certificates What 99% Purity Actually Means on a Peptide Certificate The most quoted number in the peptide market is measuring something narrower than almost everyone reading it believes. · 8 min read Analytical methods HPLC vs Mass Spectrometry: Purity and Identity Are Two Different Questions Why a peptide result that used only one of these two methods has answered half the question, and which half. · 9 min read Analytical methods Peptide Impurities: What the Other 1% Actually Is The minor peaks on a chromatogram are not random. They are a record of how the peptide was made and how it has been stored. · 10 min read Sampling Single Vial vs Batch Representative Testing The most important variable in peptide testing is not the instrument. It is how the sample got to the instrument. · 9 min read Working with a lab Choosing a Peptide Testing Laboratory: Six Questions That Actually Matter Comparing peptide testing laboratories on the wrong criteria is easy. The six that decide what a certificate is worth, and an honest note on Novagen versus Janoshik. · 10 min read Working with a lab How to Submit Peptides for Third-Party Testing What manufacturers and suppliers need to prepare before a batch ships, and the decisions that shape the certificate before the laboratory sees anything. · 8 min read Verification How to Spot a Fabricated Certificate of Analysis A convincing fake copies everything a reader pattern-matches on. What it cannot copy is a record held by the laboratory named on it. · 9 min read Verification How to Verify a Certificate of Analysis Is Real Verification takes about two minutes and most people get one step wrong, which is the step that makes the other five pointless. · 8 min read