AssayIndex
Index conventions

Within-batch spread

The range of independent purity results on one lot. A statement about bulk homogeneity and fill control, distinct from median purity.

Related terms

Batch rollup
All reports in the index for one physical lot, with a reproducibility assessment across independent tests.

Where this term appears

The glossary exists to make record pages readable without a chemistry degree. Every technical term on a report resolves here.