COAs & TestingCOAs & Testing · 4 min readA Practical Workflow for Verifying COA AuthenticityMatch the task number, the sample name, and the file. A logo and a large percent do not prove the report belongs to that vial.Read article →17 cited guides
COAs & Testing
Detailed guides to Certificates of Analysis, analytical methods, identity, purity, content, endotoxin screening, chromatograms, and report verification.
COAs & TestingCOAs & Testing · 4 min readA Practical Workflow for Verifying COA AuthenticityMatch the task number, the sample name, and the file. A logo and a large percent do not prove the report belongs to that vial.Read article →
COAs & TestingCOAs & Testing · 4 min readHPLC vs. Mass Spectrometry: Different Questions, Complementary EvidenceHPLC sorts a mixture by time on a column. Mass spectrometry sorts ions by mass. One result does not do the other test's job.Read article →
COAs & TestingCOAs & Testing · 5 min readContent Mass vs. Purity: Why the Numbers Are Not InterchangeablePurity is how clean the signal looked under the stated method. Content is how much of the named material the lab measured. The unit travels with the number.Read article →
COAs & TestingCOAs & Testing · 7 min readWhat HPLC Testing Measures in Peptide AnalysisLearn how chromatographic separation supports purity assessment and why identity requires additional evidence.Read article →COAs & TestingCOAs & Testing · 7 min readMass Spectrometry and Peptide Identity: A Clear IntroductionUnderstand molecular-mass evidence, observed ions, and why mass spectrometry complements chromatography.Read article →COAs & TestingCOAs & Testing · 7 min readUnderstanding Peptide Purity Without Overreading the NumberWhy a purity result needs a method, chromatogram, batch reference, and supporting identity evidence.Read article →COAs & TestingCOAs & Testing · 6 min readCertificate of Analysis vs. Specification SheetUnderstand the difference between a batch result and a document describing requirements or material characteristics.Read article →COAs & TestingCOAs & Testing · 7 min readChromatogram Basics: Peaks, Retention Time, and AreaA visual-analysis primer for understanding common features of an HPLC chromatogram.Read article →COAs & TestingCOAs & Testing · 8 min readEndotoxin Testing and the LAL Assay in Peptide ResearchWhat an endotoxin result evaluates, why units and limits matter, and how it complements purity and content testing.Read article →COAs & TestingCOAs & Testing · 6 min readBatch-Specific COA Verification: A Seven-Point ChecklistA repeatable checklist for matching a product vial to the correct Certificate of Analysis before laboratory review.Read article →COAs & TestingCOAs & Testing · 7 min readPeptide COA Red Flags: What Researchers Should QuestionCommon documentation problems involving missing batch numbers, unclear methods, inconsistent units, and unverifiable reports.Read article →
COAs & TestingCOAs & Testing · 4 min readAn HGH Report Is Not a Short-Peptide COA with the Name SwappedHPLC area percent and a protein identity test are different jobs. Read the method that was actually run.Read article →
COAs & TestingCOAs & Testing · 4 min readKPV 10 mg Is Not the KPV Line on the KLOW ReportTask 87708 prints KPV 11.75 mg inside a blend. The single vial on this catalog is KPV 10 mg at $39.99. Those are different records.Read article →COAs & TestingCOAs & Testing · 4 min readDo Not Add the KLOW Lines and Call the Sum KPV71.36 plus 12.41 plus 11.12 plus 11.75 is not a KPV content, and it is not the 80 mg name either.Read article →COAs & TestingCOAs & Testing · 4 min readWhat a KPV-Only Report Has to Separate from a Blend ReportOne sample name, one chain. If the PDF still lists GHK-Cu, BPC-157, and TB-500, you are holding KLOW’s paperwork.Read article →
COAs & TestingCOAs & Testing · 4 min readSermorelin 10 mg Does Not Get Tesamorelin’s Task 134410Task 134410 is Tesamorelin 20 mg, batch Tes-20, May 13, 2026. Sermorelin is a different listing at $49.99.Read article →COAs & TestingCOAs & Testing · 4 min readWhen You Open a Sermorelin Report, Match the Sample Before the PercentThe figure can be real and still belong to Tesamorelin, Ipamorelin, or a blend. Read the sample line first.Read article →