本文件规定了用离子色谱法测定车间空气中硫酸和磷酸的时间加权平均质量浓度的方法。阴离子通过电导率检测。 该方法适用于ISO7708和静态（区域）采样。 该方法不适用于三氧化硫的测定。 如果工作场所空气中同时存在酸和相应的盐，则该程序不会区分酸和相应盐。 如果工作场所空气中同时存在磷酸和五氧化二磷（磷酸酐），则该程序无法区分这两种物质。

This document specifies a method for the determination of the time-weighted average mass concentration of sulfuric acid and phosphoric acid in workplace air by ion chromatography. The anions are detected by conductivity. The method is applicable to the personal sampling of airborne particles, as defined in ISO？7708, and to static (area) sampling. The method does not apply to the determination of sulfur trioxide. The procedure does not differentiate between the acids and their corresponding salts if both are present in the workplace air. The procedure does not differentiate between phosphoric acid and diphosphorus pentoxide (phosphoric anhydride) if both are present in the workplace air.