“Tested” means little without identifying the test. A report may describe chromatographic purity while leaving other characteristics unexamined. At least four questions should be distinguished for a clear assessment. 1. Chromatographic purity A purity figure from an HPLC/UV analysis…
Reproducible research requires more than knowing a sample’s name. Its history matters too: in what form was it supplied? What storage conditions were specified? Were there any deviations? This article explains how to document this information clearly…
A certificate of analysis, or COA, is useful only when it clearly matches the material examined. A product name on a PDF is insufficient. The link between the product, batch, submitted sample and corresponding report is essential.…
HPLC and LC-MS examine different peptide properties. Learn what chromatograms, mass and purity figures actually tell you.
A clear guide to peptides, collagen and supplements: how they differ from medicines and research products, the limitations of studies and important questions about combinations.
What are peptides? A simple explanation of their structure, function and classification, from amino acids to research peptides. A clear guide to the basics.
What HPLC means for peptides: How purity analysis works, what ≥99% really means and why it matters for research.
Understanding peptide Certificates of Analysis (COAs): what they contain, how to distinguish meaningful certificates from worthless ones and why they matter for research.
