How to Read COA and HPLC Reports
A practical guide to interpreting purity and analytical outputs.
A Certificate of Analysis (COA) confirms identity and purity for a specific batch. Look for batch number, test date, and reported purity percentage.
HPLC chromatograms show peak area for the target compound versus impurities. A single dominant peak near the expected retention time with minimal secondary peaks generally indicates higher purity.
Compare COA and HPLC documents together — COA summarizes acceptance criteria while HPLC provides the underlying chromatographic evidence.
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