HJ 779-2015 in English

本标准规定了测定环境空气颗粒物中六价铬的离子色谱法。
本标准适用于环境空气颗粒物中六价铬的测定。
当采样体积为21 m3（标准状态），提取液体积为10 ml，进样量为1 ml 时，本方法的检出限为0.005 ng/m3，测定下限为0.020 ng/m3。

Scope

This standard specifies an ion chromatography method for the determination of hexavalent chromium in ambient air particulate matter. This standard applies to the determination of hexavalent chromium in ambient air particles. When the sampling volume is 21 m3 (standard state), the extraction liquid volume is 10 ml, and the injection volume is 1 ml, the detection limit of this method is 0.005 ng/m3, and the lower determination limit is 0.020 ng/m3. 2