 Cyanide in Waters and Extracts, Method 9014 by United States Environmental Protection Agency

Institutional analytical method. Cited §§1–4 address scope and interferences; §§8–9 address sample handling and quality control; §11.3 and §12.2 specify silver titration, the 2:1 cyanide-to-silver ratio, indicator and blank. The rhodanine indicator is presented as a modern comparison, not assigned to 1867.