COA, Purity & Lab Testing

Certificates of analysis, HPLC, mass spec, Janoshik reports, third-party verification, and how to read testing data.

A locked reference post so it stays clean. Every New-U batch ships with a certificate of analysis. Here's how to read ours, top to bottom: - Batch/lot number —…

Joined this week and reading my first COAs. The purity is given as an "area percent" and I want to understand what that number really represents before I quote…

Got my first independent third-party analysis back and I'd love a second pair of eyes on how I'm reading it. Main peak area percent looks high, mass-spec…

Reading my first few COAs and I keep tripping on this. The purity figure is usually "area percent" from the chromatogram. But I've also seen "weight percent"…

Annual ritual. HPLC tells you how much of the stuff is there (purity). It will not, on its own, tell you the stuff is the right molecule. I maintain that for…

Genuine disagreement-bait, in the good way. Some people treat an independent third-party report as the only COA worth trusting; others say a transparent…

Logging this because it's exactly the kind of thing that's easy to miss. Got a new batch in, pulled the COA, and the batch number on the certificate didn't…

The COA thread people keep asking for. Reading an HPLC purity report, step by step: 1. Find the main peak — that's your target compound. 2. Read its area…

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How to read a COA

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