气相色谱法分离和测定环境空气中的丙烯酸乙酯和甲基丙烯酸甲酯

Separation and Determination of Ethyl Acrylate and Methyl Methacrylate in Ambient Air by Gas Chromatography

用活性炭吸附环境空气中的丙烯酸乙酯和甲基丙烯酸甲酯 ,经二硫化碳 (CS2 )解吸后用气相色谱法测定 .在填充 2 .5 %DNP + 2 .5 %Bentone 34/ChromosorbWHPDMCS的玻璃色谱柱 (长 2m内径 3mm)上 ,丙烯酸乙酯与甲基丙烯酸甲酯及干扰物之间能较好地分离 .方法的回收率 :丙烯酸乙酯为 86.4%～ 1 0 3.0 % ,甲基丙烯酸甲酯为 86.3 %～ 1 0 1 .2 % ,变异系数 :丙烯酸乙酯为 4.1 %～ 4.4% ,甲基丙烯酸甲酯为 4.4%～ 4.9% ,当采样体积为 2 0L ,解吸液体积为 2 .0 0mL ,进样 2 μL时 ,丙烯酸乙酯和甲基丙烯酸甲酯的最低检测浓度分别为 0 .0 2mg/m3和 0 .0 1mg/m3.

Ethyl acrylate and methyl methacrylate in ambient air was captured by activated carbon then desorbed with CS\-2 and analyzed by gas chromatography. The recoveries were 86.4 %～103.0 % for ethyl acrylate and 86.3 %～101.2 % for methyl methacrylate, the coefficients of variation were 4.1 %～4.4 % for ethyl acrylate and 4.4 %～4.9 % for methyl methacrylate. The minimum detectable concentration was 0.02 mg/m\+3 and 0.01 mg/m\+3 for ethyl acrylate and methyl methacrylate respectively, while 20 L ambient air was collected.