ISO 21438-3:2010 工作场所空气 离子色谱法测定无机酸 第3部分：氢氟酸和氟化物微粒

标准编号：ISO 21438-3:2010

中文名称：工作场所空气 离子色谱法测定无机酸 第3部分：氢氟酸和氟化物微粒

英文名称：Workplace atmospheres — Determination of inorganic acids by ion chromatography — Part 3: Hydrofluoric acid and particulate fluorides

发布日期：2010-08

标准范围

ISO 21438-3:20 10规定了一种测定工作场所空气中可溶性颗粒状氟化物和氢氟酸（HF）的时间加权平均质量浓度的方法，该方法通过在预过滤器上收集颗粒状氟化物，在碱浸渍过滤器上收集HF，并通过离子色谱法进行分析。该方法仅适用于使用规定的样品制备程序测定可溶性颗粒氟化物。对于气溶胶采样，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，以及静态（区域）采样。该方法适用于测定每个样品0.005 mg至至少1.25 mg颗粒氟化物和每个样品0.012 5mg至至少1.2 mg HF的质量。测量程序适用的空气中颗粒状氟化物和HF的浓度范围由用户选择的采样方法确定。对于120L空气样品，对于颗粒氟化物，工作范围为约0.04 mg m-3至至少10mg m-3，对于HF，工作范围为约0.13 mg m-3至至少10mg m-3。HF可与预过滤器上的共采样颗粒物发生反应，对测量浓度造成干扰。

ISO 21438-3:2010 specifies a method for the determination of the time-weighted average mass concentration of soluble particulate fluorides and hydrofluoric acid (HF) in workplace air by collection of the particulate fluorides on a pre-filter and HF on an alkali-impregnated filter and analysis by ion chromatography.The method is only applicable to determination of particulate fluorides that are soluble using the sample preparation procedure specified.For aerosol sampling, 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 method is applicable to the determination of masses of 0,005 mg to at least 1,25 mg of particulate fluorides per sample and 0,012 5 mg to at least 1,2 mg of HF per sample.The concentration range of particulate fluorides and HF in air for which the measuring procedure is applicable is determined by the sampling method selected by the user. For a 120 l air sample, the working range is approximately 0,04 mg m^-3 to at least 10 mg m^-3 for particulate fluorides and approximately 0,13 mg m^-3 to at least 10 mg m^-3 for HF.HF can react with co-sampled particulate matter on the pre-filter, causing an interference on the measured concentration.

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