【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。更多还原

【Abstract】 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×0.25μm),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-butyltoluene,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.更多还原