How to Read a Certificate of Analysis (COA)
A COA is the single most useful document in research supply. Here is what each section means and what to check before you trust it.
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A COA is the single most useful document in research supply. Here is what each section means and what to check before you trust it.
Purity percentages are everywhere, but few people explain how they are measured. A plain-language guide to HPLC.
Purity and endotoxin levels are two different things. Here is what endotoxin testing measures and why researchers ask for it.
Freeze-dried research materials are stable, but only if they are stored correctly. A practical checklist for the lab.
Why every vial carries a batch number, and how that number connects your material to its test results.
Anyone can print a purity figure. Here is why results from an independent laboratory are the ones worth trusting.