工作场所空气中二氟一氯甲烷直接进样-气相色谱测定方法  

Determination of difluorochloromethane in workplace air by gas chromatography

作　　者：王倩[1] 梅勇[1] 刘婕[1] 江金凤[1] 程龙凤[1] 

机构地区：[1]武汉科技大学医学院,武汉430065

出　　处：《中国卫生检验杂志》2011年第12期2847-2848,共2页Chinese Journal of Health Laboratory Technology

摘　　要：目的:建立工作场所空气中二氟一氯甲烷的直接进样-气相色谱测定方法。方法:空气中的二氟一氯甲烷用注射器采集,直接进样,以30 m×0.32 mm×0.25μm QC3/AC-1毛细管柱分离,氢火焰离子化检测器检测。结果:二氟一氯甲烷浓度在0.48μg/ml～7.7μg/ml范围内线性较好,回归方程Y=10281x+981.73,相关系数r为0.9996,方法的检出限为0.16μg/ml,直接进样的最低检出浓度160 mg/m3。结论:该方法各项指标均达到GBZ/T210.4-2008职业卫生标准制定指南的要求。方法准确可靠、简单可行,适用于作业场所空气中二氟一氯甲烷的测定。Objective：To establish a method for determination of difluorochloromethane in the air of workplace by direct injection-gas chromatography.Methods： The difluorochloromethane in air was sampled by injector and analyzed directly.The analyte was separated in a 30 m×0.32 mm×0.25 μm QC3/AC-1 capillary column with flame ionization detection.Results： The method showed good linearity in a range from 0.48 μg/ml to 7.7 μg/ml with a correlation coefficient of 0.9996 and the linear equation was Y=10281x＋981.73.The limit of detection for difluorochloromethane was 0.16 μg/ml and the limit of concentration value was 160 mg/m3 when the sample was directly injected.Conclusion： The method was suitable and in line with Guide for establishing occupational health standards（GBZ/T 210.4-2008）,which could be widely used for determination of difluorochloromethane in workplace.

关 键 词：二氟一氯甲烷 工作场所空气 气相色谱 

分 类 号：O657.71[理学—分析化学]