水质

[中文适用范围]： 本文件规定了一种在螯合预处理后用液相色谱电感耦合等离子体质谱法 (LC-ICP-MS) 测定水中六价铬 [Cr(VI)] 和三价铬 [Cr(III)] 的方法。该方法适用于测定废水、地表水、地下水或饮用水中溶解的 Cr(VI) 和 Cr(III)，每种化合物的浓度为 0.20 μg/l 至 500 μg/l，以铬 (Cr) 质量计。含有浓度高于工作范围的 Cr 的样品可在适当稀释后进行分析。 [外文原描述]： This document specifies a method for the determination of hexavalent chromium [Cr(VI)] and trivalent chromium [Cr(III)] in water by liquid chromatography with inductively coupled plasma mass spectrometry (LC-ICP-MS) after chelating pretreatment. This method is applicable to the determination of Cr(VI) and Cr(III) dissolved in wastewater, surface water, groundwater, or drinking water from 0,20 μg/l to 500 μg/l of each compound as chromium (Cr) mass. Samples containing Cr at concentrations higher than the working range can be analysed following appropriate dilution of the sample.