标准编号：ISO 21438-1:2022
中文名称：工作场所空气 用离子色谱法测定无机酸 第1部分：非挥发性酸（硫酸和磷酸）
英文名称：Workplace atmospheres — Determination of inorganic acids by ion chromatography — Part 1: Non-volatile acids (sulfuric acid and phosphoric acid)
发布日期：2022-05
标准范围
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.
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