Archive
Category: Testing & Quality
How research peptides are made, tested and verified: HPLC, mass spectrometry, certificates of analysis, net peptide content, stability, endotoxin and how to read a study.
October 22, 2026
What a systematic review is, what a meta-analysis adds, why a paper titled "systematic review" sometimes isn't one, and what the published reviews of BPC-157, GHK-Cu, TB-500 and Cerebrolysin actually concluded.
October 22, 2026
Analytical method validation explained: specificity, accuracy, precision, LOD and system suitability under ICH Q2(R2), and what they mean for purity.
October 22, 2026
Stability testing explained: how studies set a peptide's shelf life and retest date, what ICH conditions mean, and how to read a storage claim.
October 21, 2026
COA vs SDS vs spec sheet: a COA reports one lot, an SDS covers hazards under WHMIS and a spec sheet defines the product. What each can and can't prove.
October 21, 2026
Peptide lab safety under WHMIS 2015: hazard information, PPE, weighing powders, spills, workplace labels and chemical waste disposal in Canadian labs.
October 21, 2026
HPLC vs UPLC: smaller particles and higher pressure give sharper peaks and faster runs. What that changes for peptide purity results, and what it doesn't.
October 21, 2026
Peptide molecular weight explained: calculating it from the sequence, end groups and disulfides, why salt forms weigh more, and how to check a certificate.
October 21, 2026
What a scrambled peptide control tests, how to design one, when alanine scans or inactive analogues work better, and the pitfalls that undermine controls.
October 21, 2026
Amino acid analysis explained: acid hydrolysis, derivatization and quantitation, which residues are lost, and how AAA compares with CHN, qNMR and UV.
October 20, 2026
What LC-MS is, how electrospray turns a peptide into multiply charged ions, what a mass match does and does not prove, and the three things on a certificate that LC-MS cannot answer.