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Understand what you are buying
Technical writing on analytical methods, laboratory handling and peptide manufacture, written for researchers evaluating a supplier. We publish no protocols, no dosing information, and no claims about outcomes in humans.
How to Read a Certificate of Analysis
What HPLC purity, mass-spec confirmation, water content and endotoxin figures actually tell you about a lot — and which numbers matter most.
Storage & Handling of Lyophilised Peptides
Cold-chain reality, desiccation, light exposure, freeze-thaw cycles, and how each affects the integrity of a reference material.
HPLC and Mass Spectrometry: What Each Test Proves
Purity and identity are two different questions. Here is what each analytical method answers, and why a lot needs both.
What “≥99% Purity” Means — and What It Does Not
A purity figure is a measurement under stated conditions, not a universal guarantee. Understanding the assay behind the number.
Endotoxin Testing in Research Materials
Why LAL testing appears on our COAs, what EU/mg thresholds mean, and how endotoxin load affects cell-culture work.
Peptide Synthesis: SPPS, Purification and Lot Variance
How solid-phase synthesis works, where impurities come from, and why lot-to-lot variance is the number to watch in a supplier.