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

摘要: 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%～103.0%,甲基丙烯酸甲酯为86.3%～101.2%,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20L,解吸液体积为2.00mL,进样2μL时,丙烯酸乙酯和甲基丙烯酸甲酯的最低检测浓度分别为0.02mg/m3和0.01mg/m³.

Abstract: Ethyl acrylate and methyl methacrylate in ambient air was captured by activated carbon then desorbed with CS₂ 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/m³ and 0.01 mg/m³ for ethyl acrylate and methyl methacrylate respectively, while 20 L ambient air was collected.