Methods: Active carbon tube adsorption and solvent desorption were used for sampling hexane and analysis was performed by GC(FID).

方法：以活性碳管采集空气中正己烷，用二硫化碳解吸后气相色谱（FID）测定。

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Methods:Silica gel tube adsorption and solvent desorption were used for sampling of methacrylic acid and analysis was performed by HPLC.

方法：以硅胶管采集空气中甲基丙烯酸，用甲醇解吸后高效液相色谱测定。

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