Purity
TFA vs acetate peptides: how the counter-ion changes peptide content per vial and concentration maths, and what Canadian labs should specify on bulk orders.
4 min read Why Peptide Purity Results Differ Between Two ReportsWhy does one peptide certificate of analysis read higher than another? Method, lot and storage effects explained for Canadian labs buying tested peptides.
4 min read Cyclic vs Linear Peptides: Ring Chemistry, Binding and QC ChecksCyclic vs linear peptides: how rings are closed, why constraint changes binding and the extra QC checks worth asking for on bulk research orders in Canada.
5 min read How to Read a Peptide HPLC Chromatogram Beyond the Purity NumberRead a peptide HPLC chromatogram like a QC lab: peaks, shoulders, baselines and lot-to-lot checks for Canadian labs buying tested research peptides in bulk.
5 min read Karl Fischer Titration for Peptides: Measuring Residual WaterKarl Fischer titration for peptides: why freeze-dried vials hold water, how it is measured, and how Canadian labs account for it across bulk research lots.
4 min read Peptide Endotoxin Testing and What “Research Grade” Leaves OutPeptide endotoxin testing explained: what a purity report misses, how LAL and sterility tests work, and when Canadian labs buying in bulk should request them.
4 min read Third-Party vs In-House Peptide Testing: What Independence AddsWhat third party tested peptides in Canada really means: independent vs in-house testing, what each assay covers, and how to read reports on volume orders.
5 min read Net Peptide Content: How Much Peptide Is Really in the VialNet peptide content explained for Canadian labs: why a 10 mg vial holds less peptide, how it is measured and how to correct stocks and compare…
4 min read Lab Tested Peptides in Canada: How HPLC and Mass Spec Verify a LotWhat lab tested peptides in Canada should mean: how HPLC measures purity, how mass spec confirms identity, and what to check before releasing a bulk order.
5 min read Peptide Certificate of Analysis: A Section-by-Section Reading GuideHow to read a peptide certificate of analysis: mass spec identity, HPLC purity, net content and red flags, for Canadian labs buying research peptides in bulk.
5 min readEvery article in the journal is written for laboratory research and analytical work. Nothing here is guidance on using any product in people or animals. Browse the catalogue, the glossary or the full research library.