车间空气.汞和无机汞化合物的测定.低温蒸气原子吸收分光光度测定法或原子荧光分光光度测定法

[中文适用范围]： 本国际标准规定了测定工作场所空气中汞蒸气和无机汞化合物的时间加权平均质量浓度的程序。 使用扩散徽章或泵吸吸附剂管将汞蒸气收集在固体吸附剂上。 颗粒状无机汞化合物（如果存在）被收集在石英纤维过滤器上。 将收集到的汞酸溶解后，使用冷蒸气原子吸收光谱法 (CVAAS) 或冷蒸气原子荧光光谱法 (CVAFS) 对样品进行分析。 本国际标准适用于评估个人对空气中汞蒸气和/或颗粒状无机汞化合物的暴露，以与汞和无机汞化合物的长期或短期暴露限值进行比较以及静态（区域）采样。 程序工作范围的下限是定量限。 这取决于用户选择的采样和分析方法，但通常在 0.01 µg 至 0.04 µg 汞范围内（见 13.1）。 该程序工作范围的上限由用于样品收集的扩散徽章、吸附剂管或过滤器的容量决定，但至少为 30 µg 汞（见 13.2）。 本国际标准适用的空气中汞浓度范围部分取决于用户选择的采样方法，但也取决于空气样品体积。 当大气中存在氯时，例如在氯碱工厂中，扩散徽章法不适用于汞蒸气的测量，但氯不会干扰泵吸管法（见13.12.1）。 气态有机汞化合物可能对汞蒸气的测量造成正干扰（见 13.12.2）。 同样，吸附在空气颗粒上的颗粒有机汞化合物和气态有机汞化合物可能会对颗粒无机汞化合物的测量造成正面干扰（见13.12.3）。 [外文原描述]： ISO 17733:2015 specifies a procedure for determination of the time-weighted average mass concentration of mercury vapour and inorganic mercury compounds in workplace air. Mercury vapour is collected on a solid sorbent using either a diffusive badge or a pumped sorbent tube. Particulate inorganic mercury compounds, if present, are collected on a quartz fibre filter. Samples are analysed using either cold vapour atomic absorption spectrometry (CVAAS) or cold vapour atomic fluorescence spectrometry (CVAFS) after acid dissolution of the mercury collected. This International Standard is applicable to the assessment of personal exposure to mercury vapour and/or particulate inorganic mercury compounds in air for comparison with long-term or short-term exposure limits for mercury and inorganic mercury compounds and for static (area) sampling. The lower limit of the working range of the procedure is the quantification limit. This is determined by the sampling and analysis methods selected by the user, but it is typically in the range 0,01 µg to 0,04 µg of mercury (see 13.1). The upper limit of the working range of the procedure is determined by the capacity of the diffusive badge, sorbent tube or filter used for sample collection, but it is at least 30 µg of mercury (see 13.2). The concentration range of mercury in air for which this International Standard is applicable is determined in part by the sampling method selected by the user, but it is also dependent on the air sample volume. The diffusive badge method is not applicable to measurements of mercury vapour when chlorine is present in the atmosphere, e.g. in chloralkali works, but chlorine does not interfere with the pumped sorbent tube method (see 13.12.1). Gaseous organomercury compounds could cause a positive interference in the measurement of mercury vapour (see 13.12.2). Similarly, particulate organomercury compounds and gaseous organomercury compounds adsorbed onto airborne particles could cause a positive interference in the measurement of particulate inorganic mercury compounds (see 13.12.3).