气相色谱法同时测定工作场所空气中15种有机物

沈东旭; 吴正龙; 吴国斌; 彭晓梅; 沈卫康

doi:10.16369/j.oher.issn.1007-1326.2017.06.003

气相色谱法同时测定工作场所空气中15种有机物

Simultaneous determination of 15 organic compounds in the air of workplace by gas chromatography

摘要

摘要:
目的建立同时测定工作场所中苯、甲苯、邻二甲苯、间二甲苯、对二甲苯、乙苯、苯乙烯、正己烷、丙酮、丁酮、乙酸乙酯、乙酸丁酯、环己酮、三氯乙烯、四氯乙烯等15种有机物的气相色谱方法。
方法目标物采用活性炭吸附, 二硫化碳解吸, 经CP-WAX极性色谱柱程序升温分离, 火焰离子化检测器(flame ionization detector, FID)测定。
结果 15种化合物在色谱柱上分离良好, 定量限范围0.50~15.98 mg/L, 检出限范围0.15~4.80 mg/L, 线性关系良好, 相关系数都>0.999 0, 回收率范围76.8%~99.5%, 相对标准偏差 < 4%。
结论该方法简便快捷, 准确性好, 灵敏度高, 适用于工作场所空气中15种有机物的同时测定。

Abstract:
Objective To establish a gas chromatographic method for the simultaneous determination of 15 organic compounds including benzene, toluene, o-xylene, m-xylene, p-xylene, ethylbenzene, styrene, n-hexane, acetone, butanone, ethyl acetate, butyl acetate, cyclohexanone, trichlorethylene, and tetrachlorethylene in workplaces.
Methods The targets were absorbed by carbon tube. After desorption by carbon disulfide, the solution was separated by CP-WAX capillary column, and then detected by FID detector.
Results The limits of quantitation were 0.50-15.98 mg/L, and the limits of detection were 0.15-4.80 mg/L. Good linear relationships were achieved, with the correlation coefficients above 0.999 0. The recoveries ranged from 76.8% to 99.5% and the relative standard deviations were less than 4%.
Conclusion The method is simple and sensitive, and suitable for simultaneous determination of 15 kinds of organic compounds in the air of workplaces.

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