ISO 21438-1:2007 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）
标准编号：ISO 21438-1:2007
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：2007-12
标准范围
ISO 21438-1:20 07规定了用离子色谱法测定工作场所空气中硫酸和磷酸的时间加权平均质量浓度的方法。该方法适用于ISO 7708中定义的空气颗粒可吸入部分的个人采样和静态（区域）采样。该分析方法适用于测定每个样品中质量为0,005 mg至2,000 mg的硫酸和磷酸，无需稀释。测量程序适用的空气中硫酸和磷酸的浓度范围由用户选择的采样方法确定。对于体积为1 m3的空气样品，工作范围约为0,005 mg/m3至2,000 mg/m3。本方法不适用于三氧化硫的测定。如果空气中存在酸及其相应的盐，则该程序不允许区分两者。如果工作场所存在磷酸和五氧化二磷（磷酸酐），则该程序不允许区分两者。
ISO 21438-1:2007 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 method 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 0,005 mg to 2,000 mg of sulfuric acid and phosphoric acid per sample, without dilution.The concentration range of sulfuric acid and phosphoric acid in air for which the measuring procedure is applicable is determined by the sampling method selected by the user. For an air sample of volume 1 m3, the working range is approximately 0,005 mg/m3 to 2,000 mg/m3.The method is not applicable to the determination of sulfur trioxide.The procedure does not allow differentiation between the acids and their corresponding salts if both are present in the air.The procedure does not allow differentiation between phosphoric acid and diphosphorus pentoxide (phosphoric anhydride) if both are present in the workplace.
标准预览图
