标准摘要
[中文适用范围]： 本标准规定了工作场所空气中六价铬时间加权平均质量浓度的测定方法。 对于可溶性和不溶性六价铬的萃取，规定了单独的样品制备方法。 如果需要，不溶性六价铬的方法也可用于制备用于测定总六价铬的样品。 本国际标准适用于 ISO 7708 中定义的空气颗粒可吸入部分的个人采样，以及静态（区域）采样。 该分析方法适用于测定每个样品中 0.01 μg 至 10 μg 六价铬的质量，无需稀释。 该测量程序适用的空气中六价铬的浓度范围由用户选择的采样方法决定（见10.1）。 对于 1 m3 空气样品，无需样品稀释，工作范围约为 0.01 μg⋅m−3 至 10 μg⋅m−3。 [外文原描述]： ISO 16740:2005 specifies a method for the determination of the time-weighted average mass concentration of hexavalent chromium in workplace air. Separate sample preparation methods are specified for the extraction of soluble and insoluble hexavalent chromium. The method for insoluble hexavalent chromium can also be used to prepare samples for determination of total hexavalent chromium, if desired. ISO 16740:2005 is applicable to the personal sampling of the inhalable fraction of airborne particles, as defined in ISO 7708, and to static (area) sampling. The analytical method is applicable to the determination of masses of 0,01 micrograms to 10 micrograms of hexavalent chromium per sample, without dilution. The concentration range of hexavalent chromium in air for which the measuring procedure is applicable is determined by the sampling method selected by the user. For a 1 cubic metre air sample, without sample dilution, the working range is approximately 0,01 micrograms per cubic metre to 10 micrograms per cubic metre.
英文名称Workplace air — Determination of hexavalent chromium in airborne particulate matter — Method by ion chromatography and spectrophotometric measurement using diphenyl carbazide