quality control
6 articles tagged with ‘quality control’
What a Peptide Blend Costs You Analytically
Put four peptides in one vial and ask what its purity figure refers to. The largest peak is not the product, and the other three peaks are not impurities. What a blend costs you analytically, with our own four blends audited against the same standard.
Identity Is the Test Almost Nobody Runs
Rearrange TB-500's seven residues and there are 1,260 arrangements that all weigh exactly the same. Purity gets reported constantly and identity almost never, so here is what each method can and cannot establish about whether a vial holds the sequence on the label.
How to Tell If a Peptide Supplier Is Legitimate: The 2026 Verification Checklist
A certificate of analysis is the easiest document in this market to fake. Nine checks, ranked by how hard each one is to fake, including the two that separate a traceable supplier from a convincing one.
How to Verify Peptide Purity: HPLC, Mass Spectrometry, and Red Flags
A practical guide to interpreting HPLC chromatograms, mass spectrometry data, and Certificates of Analysis — with specific red flags that expose low-quality peptide suppliers before they compromise your research.
How to Read a Certificate of Analysis (COA): The Complete Guide for Peptide Researchers
A working guide to interpreting every section of a peptide Certificate of Analysis — from HPLC chromatograms and mass spec data to spotting the red flags that separate credible documentation from recycled paperwork.
Understanding HPLC Purity Testing in Peptide Research
An in-depth look at how HPLC works, why it's the gold standard for peptide purity analysis, and how to interpret chromatographic data in COA documents.