https://ruogate.com/blog/ Educational notes on laboratory reference materials, analytical documentation, storage and cold chain, and what an underwriter looks for on a research-use-only supplier site. en-us Wed, 30 Sep 2026 09:00:00 GMT https://ruogate.com/blog/lot-numbers-and-traceability/https://ruogate.com/blog/lot-numbers-and-traceability/Wed, 30 Sep 2026 09:00:00 GMTHow a lot number links a research reagent vial to its certificate, raw test data and supplier, where that chain breaks, and what to record at receipt. https://ruogate.com/blog/cold-chain-for-research-shipments/https://ruogate.com/blog/cold-chain-for-research-shipments/Sat, 26 Sep 2026 09:00:00 GMTHow to pack, monitor and time cold research shipments, and what a receiving lab should record on arrival so the temperature history holds up. https://ruogate.com/blog/hplc-purity-explained/https://ruogate.com/blog/hplc-purity-explained/Sat, 26 Sep 2026 09:00:00 GMTHPLC purity is a ratio of peak areas under one method. Learn to read the chromatogram and why the column and detection wavelength decide the number. https://ruogate.com/blog/lyophilized-reference-material-storage/https://ruogate.com/blog/lyophilized-reference-material-storage/Sat, 26 Sep 2026 09:00:00 GMTPractical storage rules for lyophilized reference material: temperature, light, humidity, desiccant upkeep and freeze-thaw control, with records. https://ruogate.com/blog/mass-spec-identity-testing/https://ruogate.com/blog/mass-spec-identity-testing/Sat, 26 Sep 2026 09:00:00 GMTHow an observed-versus-expected mass comparison works, what it confirms about a research reagent, and which questions it leaves for orthogonal methods. https://ruogate.com/blog/reading-a-certificate-of-analysis/https://ruogate.com/blog/reading-a-certificate-of-analysis/Sat, 26 Sep 2026 09:00:00 GMTA section-by-section guide to a certificate of analysis: header, lot number, test methods, specifications versus results, and the signature block. https://ruogate.com/blog/safety-data-sheets-sixteen-sections/https://ruogate.com/blog/safety-data-sheets-sixteen-sections/Sat, 26 Sep 2026 09:00:00 GMTA walk through the sixteen GHS sections of a safety data sheet, the ones research suppliers most often get wrong, and how an SDS differs from a CoA.