ISO 20950-1:2018 水质 可用的弱离合氰化物 (WAD) 的测定 第1部分:使用配体交换、流动注射分析、气体扩散和电流测定的方法
标准编号:ISO 20950-1:2018
中文名称:水质 可用的弱离合氰化物 (WAD) 的测定 第1部分:使用配体交换、流动注射分析、气体扩散和电流测定的方法
英文名称:Water quality — Determination of available weak and dissociable (WAD) cyanide — Part 1: Method using ligand exchange, flow injection analysis (FIA), gas-diffusion and amperometric detection
发布日期:2018-05
标准范围
本文件规定了各种类型水中可用WAD氰化物测定的操作定义方法,如饮用水、地面和地表水、水和冶金加工尾矿回收、堆浸贫瘠、矿浆尾矿和浸出溶液,氰化物浓度为5μg/l至2000 mg/l,以未稀释样品中的氰化物离子表示。可通过改变操作条件来改变应用范围,例如使用不同的注入量、较厚的膜、检测器响应等。注ISO 2080:2008第3.105节定义了游离氰化物。可用WAD氰化物的浓度包括游离氰化物和通过特定分析方法测定的溶液中络合的一些金属,但不是总氰化物中存在的所有金属络合物(3191)。在该方法中,描述了六个合适的质量浓度范围,从5μg/l到50μg/l,从50μg/l到500μg/l,从0,5 mg/l到5 mg/l,从5 mg/l到50 mg/l,从50 mg/l到500 mg/l,从500 mg/l到2000 mg/l。
This document specifies operationally defined methods for the determination of available WAD cyanide in various types of water such as drinking, ground, and surface, waters, and metallurgical processing tailings reclaim, heap leach barren, mill slurry tailings 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 changed by varying the operation conditions, e.g. by using a different injection volume, thicker membrane, detector response, etc.NOTE ISO 2080:2008, 3.105, defines free cyanide. The concentration of available WAD cyanide includes free cyanide and some of the metals complexed in solution as determined by a specified analytical method but not all of the metal complexes present in total cyanide (3,191).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.
标准预览图


