Ambient air quality - standard method for measurement of benzene concentrations - part 2 : pumped sampling followed by solvent desorption and gas chromatography 环境空气质量.测量苯浓度的标准方法.第2部分:溶剂吸附和气相色谱法后泵送取样
2.
Ambient air quality - standard method for measurement of benzene concentrations - part 5 : diffusive sampling followed by solvent desorption and gas chromatography 环境空气质量.测量苯浓度的标准方法.第5部分:溶剂吸附和气体色谱法后的扩散取样