Precision Analysis. American Standards.

Reading a COA — And Knowing What to Look For A Certificate of Analysis (COA) is the document that accompanies every lab-tested compound. It's meant to give you confidence in what you're working with. But not all COAs are created equal — and knowing how to read one is just as important as having one. What a basic COA includes: Compound name and lot/batch number Testing method used (e.g., HPLC, LC-MS, NMR) Purity percentage Date of analysis Lab name and signature What separates

Two Powerful Tools. Different Answers. Analytical chemistry isn't one-size-fits-all. Depending on what you need to know about a compound, different instruments give you different kinds of answers. Two of the most important in peptide and small molecule analysis are LC-MS and NMR — and understanding the difference helps you choose the right test. LC-MS (Liquid Chromatography-Mass Spectrometry) LC-MS separates the components of your sample and then measures the mass-to-charge

The Problem With "Purity Testing" Alone If you've ever ordered peptide testing and received a certificate showing 98% purity, you may have felt confident in that result. But here's what most people don't realize: a standard HPLC purity number tells you how much of something is in your sample — it doesn't confirm that the something is actually what you think it is. High-Performance Liquid Chromatography (HPLC) works by separating components in a sample based on how they inte