Research library
Analytical guides for peptide researchers.
Plain-language explanations of peptide testing, certificates, accreditation, and lab handling.
Quality · 7 min readHow to Read a Peptide Certificate of AnalysisA field-by-field guide to a research peptide COA: lot number, HPLC purity, LC-MS identity, net peptide content, endotoxin, and what a trustworthy certificate looks like.Analytical methods · 6 min readHPLC vs. Mass Spectrometry: What Each Test Proves About a PeptideWhy a research peptide needs both HPLC purity and LC-MS identity testing, what each method measures, and how to read the results together.Quality · 5 min readISO/IEC 17025 Accreditation, Explained for Peptide BuyersWhat ISO/IEC 17025 accreditation means, what it does and does not guarantee, and how to verify that a testing laboratory is accredited.Lab handling · 5 min readLyophilized Peptide Storage and Stability in the LaboratoryStorage temperatures, light and moisture control, and inventory practices that protect the stability of lyophilized research peptides.Procurement · 6 min readChoosing a Research Peptide Supplier: A 10-Point ChecklistA procurement checklist for laboratories evaluating research peptide suppliers: testing, traceability, documentation, shipping, and purchasing terms.Analytical methods · 6 min readNet Peptide Content vs. Purity: Why a Peptide Has Two Different NumbersWhy HPLC purity and net peptide content are different measurements, how each is determined, and how to read both on a research peptide certificate.Chemistry · 5 min readPeptide Counter-Ions: Acetate vs. TFA Salts in Research PeptidesWhat counter-ions are, why synthetic peptides are supplied as TFA or acetate salts, and how the salt form affects net content and assay work.Quality · 6 min readEndotoxin Testing (LAL) Explained for Research Peptide BuyersWhat bacterial endotoxin is, how LAL and recombinant factor C tests work, how results are reported in EU/mg, and why endotoxin matters for in-vitro assays.Chemistry · 7 min readHow Solid-Phase Peptide Synthesis Creates ImpuritiesA plain-language guide to Fmoc solid-phase peptide synthesis and the deletion, truncation, racemization, and oxidation impurities that HPLC and LC-MS detect.Analytical methods · 7 min readReading an HPLC Chromatogram, Step by StepHow to read the HPLC chromatogram on a peptide certificate: axes, retention time, main peak, impurity peaks, integration, and how purity is calculated.Procurement · 5 min readHow to Verify a Research Peptide Vial and Spot CounterfeitsA practical verification routine for incoming research peptide vials: label, lot, QR code, certificate, laboratory accreditation, and red flags for counterfeit product.
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