二硫化碳解吸-气相色谱法测定环境空气和废气中4种醇醚酯类化合物的含量

Determination of 4 Alcohol Ether Esters in Ambient Air and Waste Gas by Gas Chromatography with Carbon Disulfide Desorption

将采集了30 L废气或环境空气的活性炭吸附管转移至具塞玻璃试管中,加入1.00 mL二硫化碳,静置解吸30 min。以HP-WAX毛细管柱为固定相,在柱升温程序下分离丙二醇甲醚乙酸酯、乙二醇乙醚乙酸酯、乙二醇丁醚乙酸酯、二乙二醇丁醚乙酸酯。结果表明:4种醇醚酯类化合物的质量浓度分别在1.00~20.0 mg·L^(-1)和10.0~200 mg·L^(-1)内与对应的峰面积呈线性关系,检出限(3.143s)为0.007~0.008 mg·m^(-3);按照标准加入法进行回收试验,回收率为77.9%~93.5%,测定值的相对标准偏差(n=6)为3.2%~15%。

The activated carbon adsorption tube collected 30 L of waste gas or ambient air was transferred into a glass tube with stopper,and 1.00 mL of carbon disulfide was added for settling desorption for 30 min.The HP-WAX capillary column was used as stationary phase,and propylene glycol methyl ether acetate,ethylene glycol ethyl ether acetate,ethylene glycol butyl ether acetate and diethylene glycol butyl ether acetate were separated under the column heating program.It was shown that linear relationships between the mass concentrations and peak areas of the 4 alcohol ether esters were kept in the ranges of 1.00-20.0 mg·L^(-1)and 10.0-200 mg·L^(-1),with detection limits(3.143s)in the range of 0.007-0.008 mg·m-3.Test for recovery was made by standard addition method,giving results in the range of 77.9%-93.5%,and RSDs(n=6)of the determined values ranged from 3.2%to 15%.