水质 - 可用的总氰化物的测定 - 使用分段流动注射的方法 通过气体扩散和电流检测的在线紫外线消解分析

[中文适用范围]： 本文件规定了饮用水、地下水、地表水、废水、冶金加工尾矿回收液、堆浸贫液、磨浆尾矿滤液和浸出液等各类水中总氰化物测定的操作定义方法，未稀释样品中氰化物浓度为 5 µg/l 至 2000 mg/l，以氰化物离子表示。 通过降低灵敏度可以扩大应用范围（图A.1.）。 注 ISO 2080:2008, 3.105 定义了游离氰化物。 总氰化物的浓度定义为通过特定分析方法测定的必须存在的所有金属氰化物络合物。 在该方法中，六种合适的质量浓度范围为 5 µg/l 至 50 µg/l、50 µg/l 至 500 µg/l、0.5 mg/l 至 5 mg/l、5 mg/l 至描述了50mg/l、50mg/l至500mg/l和500mg/l至2000mg/l。 [外文原描述]： This document specifies operationally defined methods for the determination of total cyanide in various types of water such as drinking water, ground water, surface water, wastewaters, metallurgical processing tailings reclaim solution, heap leach barren solution, mill slurry tailings filtrate and leaching solutions, with cyanide concentrations from 5 µg/l to 2 000 mg/l expressed as cyanide ions in the undiluted sample. The range of application can be extended by reducing the sensitivity (Figure A.1.). NOTE ISO 2080:2008, 3.105, defines free cyanide. The concentration of total cyanide as defined in ISO 2080:2008, 3.191 includes free cyanide, cyanide complexed with metals in solution as cyanide anion, but not necessarily all of the metal cyanide complexes present as determined by a specified analytical method. In this method, six suitable mass concentration ranges from 5 µg/l to 50 µg/l, from 50 µg/l to 500 µg/l, from 0,5 mg/l to 5 mg/l, from 5 mg/l to 50 mg/l, from 50 mg/l to 500 mg/l and from 500 mg/l to 2 000 mg/l are described.