ISO 17091:2013规定了一种测定工作场所空气中氢氧化锂(LiOH)、氢氧化钠(NaOH)、氢氧化钾(KOH)和二氢氧化钙[Ca(OH)2]的时间加权平均质量浓度的方法，该方法通过在过滤器上收集颗粒氢氧化物并使用离子色谱法分析相应的阳离子。 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2.5 mg锂和每个样品0.01 mg至至少5mg钠、钾和钙的质量。 空气中的颗粒状LiOH、NaOH、KOH和Ca(OH)2的浓度范围通过用户选择的取样方法来确定。对于1 m3的空气样品，工作范围约为0,002 mg m？3至至少20毫克m？所有四种氢氧化物均为3。对于30 l空气样品，工作范围的下限约为0.1 mg m？所有四种氢氧化物均为3。 如果氢氧化物和它们相应的盐都存在于空气中，则该方法不允许区分两者。如果阳离子以氢氧化物的形式单独存在，则该方法对这些碱性化合物是特异的。在其他情况下，所获得的结果代表采样空气中可能存在的氢氧化物的最高浓度。

ISO 17091:2013 specifies a method for the determination of the time-weighted average mass concentration of lithium hydroxide (LiOH), sodium hydroxide (NaOH), potassium hydroxide (KOH), and calcium dihydroxide [Ca(OH)₂] in workplace air by collection of the particulate hydroxides on a filter and analysis of the corresponding cations using ion chromatography. 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 2,5 mg of lithium per sample and 0,01 mg to at least 5 mg of sodium, potassium, and calcium per sample. The concentration range of particulate LiOH, NaOH, KOH, and Ca(OH)₂ in air for which the measuring procedure is applicable is determined by the sampling method selected by the user. For a 1 m³ air sample, the working range is approximately 0,002 mg m^？3 to at least 20 mg m^？3 for all four hydroxides. For a 30 l air sample, the lower limit of the working range is approximately 0,1 mg m^？3 for all four hydroxides. The procedure does not allow differentiation between the hydroxides and their corresponding salts if both are present in the air. If the cations are present alone in the form of hydroxides, the method is specific for these basic compounds. In other circumstances, the results obtained represent the highest concentration of the hydroxides that could be present in the sampled air.