Peptide science & testing guides
Guides to Certificates of Analysis, HPLC purity, endotoxin testing, synthesis and storage.
- How to Read a Certificate of Analysis
A walkthrough of every section of a peptide COA — identity, HPLC purity, lot number, and the red flags that separate real lab documents from marketing.
6 min read - HPLC Purity Testing, Explained
What high-performance liquid chromatography actually measures, how a purity percentage is calculated from a chromatogram, and why ≥99% matters for research validity.
5 min read - Storing Lyophilized Peptides in the Lab
Why research peptides ship as freeze-dried powder, what actually degrades them, and evidence-based storage practice from receipt to long-term archive.
5 min read - LAL Endotoxin Testing and Why It Matters
Bacterial endotoxins are invisible to HPLC yet can dominate biological results. What the limulus amebocyte lysate assay detects and why every lot gets one.
4 min read - How Research Peptides Are Made
Solid-phase peptide synthesis from resin to lyophilized vial: Fmoc chemistry, coupling cycles, cleavage, preparative HPLC, and why sequence length drives cost.
6 min read - What Does “Research Use Only” Mean?
A plain-language explanation of Research Use Only (RUO) labeling: what it means, what it does not mean, and how it applies to purchases from USA Prime Peptides.
5 min read