Peptide testing5 min read
Peptide Identity Testing by Mass Spectrometry
What an MS identity result confirms, what it does not confirm, and what information a useful peptide report should contain.
Read guideQCTests knowledge base
Understand the test before you order it.
Clear, practical guidance for peptide and cosmetic testing—written to help buyers define the right scope, read results correctly and avoid common misunderstandings.
Peptide testing5 min read
HPLC Peptide Purity: What the Percentage Means
A practical explanation of peptide HPLC purity, chromatograms, area percentage and the limits of a purity result.
Read guideTest selection6 min read
MS, HPLC or LC-MS: Choosing a Peptide Test
A concise comparison of identity, purity and combined separation-mass analysis for peptide samples.
Read guideResults interpretation5 min read
Net Peptide Content vs HPLC Purity
Why a high HPLC purity percentage does not necessarily mean a vial contains the labelled amount of peptide.
Read guideSafety testing5 min read
Endotoxin Testing for Peptide Samples
What bacterial endotoxin testing measures, common units, and why sample interference must be considered.
Read guideSafety testing5 min read
Heavy Metals Testing for Peptides and Cosmetics
How to define a practical elemental-impurity panel for peptide materials, cosmetic ingredients and finished products.
Read guideSample handling5 min read
How to Prepare and Ship a Peptide Sample for Testing
A simple pre-shipment checklist for peptide identity, purity, content and safety testing.
Read guideCOA guidance6 min read
How to Read a Peptide Certificate of Analysis
A field-by-field guide to sample identity, components, methods, specifications, results and verification status on a peptide COA.
Read guideCOA guidance4 min read
How Online COA Verification Works
What certificate verification can prove, why full reports remain private, and how to spot an incomplete check.
Read guideCosmetic testing6 min read
Cosmetic Raw Material vs Finished Product Testing
Why ingredient testing and finished-product testing require different samples, methods and decisions.
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