ISO 16000-4:20 11规定了使用具有溶剂解吸和高效液相色谱（HPLC）的扩散采样器测定室内空气中的甲醛。 该测试方法适用于室内空气中甲醛的测量，范围为0,001 mg/m3至1.0 mg/m3，采样时间为24小时至72小时。对于24小时的采样期，适用的浓度范围为0,003 mg/m3至1 mg/m3，对于72小时，适用的浓度范围为0,001 mg/m3至0.33 mg/m3。 该方法适用于具有常规室内空气相对湿度的大气中的测量和低至0.02 m/s的空气速度下的监测。该方法中的色谱步骤旨在消除潜在的干扰，包括由于存在其他羰基化合物而产生的干扰。采样方法给出了时间加权平均结果。

ISO 16000-4:2011 specifies a determination of formaldehyde in indoor air using a diffusive sampler with solvent desorption and high performance liquid chromatography (HPLC). The test method is applicable to the measurement of formaldehyde in indoor air over the range from 0,001 mg/m³ to 1,0 mg/m³ for a sampling period of between 24 h and 72 h. For sampling periods of 24 h, the applicable concentration range is 0,003 mg/m³ to 1 mg/m³, and for 72 h it is 0,001 mg/m³ to 0,33 mg/m³. The method is suitable for measurements in atmospheres with conventional indoor air relative humidity and for monitoring at air velocities as low as 0,02 m/s. The chromatographic step in the method is designed to eliminate potential interferences, including those due to the presence of other carbonyl compounds. The sampling method gives a time-weighted average result.