COA divergence
The supplier's declared purity minus the median of independent measurements on the same lot. Flagged above 1.5 pp by rule AX-R05.
Related terms
- Rule AX-R05
- Declared purity more than 1.5 pp above the median of at least two independent tests on the same lot. The index's most consequential rule.
see also COA divergence
Where this term appears
The glossary exists to make record pages readable without a chemistry degree. Every technical term on a report resolves here.
- Assay report records — the term appears in result tables, peak tables and provenance blocks
- Method references — where the measurement behind the term is defined
- All 23 glossary terms beginning with C