 standard solution

Entry in IUPAC Compendium of Chemical Terminology, fifth edition (Gold Book) by International Union of Pure and Applied Chemistry, issued by International Union of Pure and Applied Chemistry. No individual entry author is established. The official citation identifies online version 5.0.0, 2025; this is a compendium version date. The entry cites the Orange Book, second edition, p. 48 as its underlying source.

Online text: goldbook.iupac.org/terms/view/S05924/1000

Metadata verification: Official indexed entry and citation; direct request unavailable

Cited passages: Definition paragraphs: primary standard, secondary standard solution; underlying source Orange Book, second edition, p. 48.