Choose the question you need answered
Start here when you have a certificate, a purity claim or a supplier quotation and need to understand what it actually establishes. These guides separate measured results from assumptions and include practical records you can adapt.
Read a batch report
- What Is a Certificate of Analysis (COA)? How to Read One
A COA proves your peptide purity. Learn what HPLC and mass spectrometry mean and how to read your certificate.
- Peptide COA Batch Matching Checklist
Match a research peptide vial to its certificate of analysis using lot IDs, sample references, report versions and an original documentation checklist.
- How to Read HPLC Results on a Peptide COA
How to read HPLC chromatograms on your peptide COA — purity percentages, peak analysis, and what to look for.
Understand the measurement
- Peptide Purity vs Net Peptide Content
Understand HPLC purity, net peptide content and labelled mass, with a worked example and a checklist for reviewing research peptide documentation.
- HPLC vs Mass Spectrometry for Peptides
Compare what HPLC and mass spectrometry tell you about research peptides, which questions remain open, and how to request useful analytical evidence.
- Research Reagents vs Certified Reference Materials
Distinguish a research reagent, a reference material and a certified reference material before interpreting a COA or planning a measurement comparison.
Compare suppliers and specifications
- Research Peptide Supplier Checklist for UK Labs
Use a practical UK research-peptide supplier checklist covering batch documents, identity, quantities, service terms and unresolved questions before ordering.
- How to Verify Peptide Purity With HPLC, Mass Spectrometry, and COAs
What HPLC and mass spectrometry actually prove, how to read a purity percentage, and what to check on a Certificate of Analysis before buying.
- Research Peptide Blends: Ratios and Documentation
Review research peptide blends with a checklist for component identity, stated ratios, quantity basis, batch evidence and experimental interpretation.
Use the documents for the right purpose
For a received order, match the actual batch before relying on a certificate. For a literature claim, follow the original paper and keep its limitations visible. A guide is not a regulatory approval, clinical recommendation or batch-release decision.
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