应急快速检测空气中对-特丁基甲苯气相色谱测定方法的研究  

A rapid gas chromatographic method for determination of P-tert-butyl toluene in the air of workplace

作　　者：陈卫[1] 刘桂华[1] 林凯[1] 何彩[1] 仲岳桐[1] 

机构地区：[1]深圳市疾病预防控制中心,深圳518055

出　　处：《卫生研究》2012年第3期498-500,共3页Journal of Hygiene Research

基　　金：广东省深圳市科技局科研项目(No.200903124)

摘　　要：目的建立应急快速检测空气中对-特丁基甲苯气相色谱测定方法。方法用注射器采集工作场所空气中的对-特丁基甲苯,直接进样,经30m×0.53mm×0.25μm FFAP毛细管色谱柱分离,氢火焰离子化检测器检测。结果本方法在0～320μg/ml范围呈线性关系;样品在注射器中可保存5h,方法的重现性好;不同浓度对-特丁基甲苯测定结果的相对标准偏差为0.65%～1.98%;回归方程式为Y=26437+4836X,r=0.9994;方法的最低检出浓度为1.12 mg/m3。空气中与对-特丁基甲苯共存的间-特丁基甲苯、邻-特丁基甲苯、乙酸乙酯、丁酮、甲苯、邻二甲苯在本方法条件下不干扰测定。结论此方法各项指标均达到《职业卫生标准制定指南第四部分:工作场所空气中化学物质检测方法》(GBZ/T210.4-2008)的要求,适用于工作场所空气中对-特丁基甲苯的现场监测。Objective To establish a rapid gas chromatographic method for determination of P-tert-Butyl toluene in the air of workplace. Methods The air samples were collected by syringes, injected directly to the GC system, and then separated by a FFAP capillary column （30m×0. 53mm×0.251xm）, finally determined by a Flame Ionization Detector. Results This method showed good linear correlation within a range of 0 - 320μg/ml, with regression formula Y = 26437 ＋ 4836X, r = 0. 9994. The air sample could be stably stored in the syringe for 5 hours. The relative standard deviation （RSD） of repeated injection of P-tert-butyl toluene standard solutions at three concentration levels by six times was 0.65% - 1.98%. The minimum detectable concentration was calculated to be 1.12 mg/m3. Other volative organic solvents, e. g. , M-tert-butyholuene , ethyl acetate,methylethyl ketone, O-tert-butyl toluene, toluene, O-xylene are not interferences. Conclusion This method meets the requirement of Guide for establishing occupational health standards-Part 4： Determination methods of air chemicals in workplace. It is applicable for determination of P-tert-butyl toluene in the air of workplace.

关 键 词：空气对 特丁基甲苯 气相色谱 

分 类 号：R134.4[医药卫生—劳动卫生]