工作场所空气中六氟丙烯的热解吸气相色谱测定方法验证报告  

Validation experiment for determination of hexafluoropropylene in workplace air by thermal desorption-gas chromatography

作　　者：江金凤[1] 梅勇[1] 王倩[1] 刘婕[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》2010年第11期2732-2733,共2页Chinese Journal of Health Laboratory Technology

摘　　要：目的:验证正在研制的职业卫生标准"工作场所空气中六氟丙烯的热解吸气相色谱测定方法"。方法:用活性炭管吸附空气中六氟丙烯,热解吸仪解吸,以SE-54毛细管柱分离,氢火焰离子检测器测定。结果:方法的线性范围为0～0.202μg/ml,相关系数r=0.9997,回归方程Y=386.09X+1.026。方法检出限为4.2×10-4μg/ml,最低检出浓度为0.014 mg/m3(以采集3 L空气计算)。高、中、低浓度的精密度分别为4.18%、4.25%、6.87%,回收率>93.98%;采样效率可达100%,铝箔袋采样后,室温下放置第5天平均下降率为4.40%,样品室温下至少可稳定5 d。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第4部分:工作场所空气中化学物质测定方法》的要求,可作为工作场所空气中六氟丙烯的检测方法,适用于工作场所空气中六氟丙烯的测定。Objective：To validate a developing method for determination of hexafluoropropylen in workplace air based on gas chromatography coupled with thermal desorption.Methods： A dynamic air sampling method to trap hexafluoropropylen was developed by using active carbon tube.Air samples were separated and analyzed in a SE-54 capillary column and FID detector after desorption by a thermal desorption instrument.Results： The method showed good linearity in a range from 0 to 0.202 μg/ml with a correlation coefficient of 0.9997.The limit of detection for hexafluoropropylen was 4.2×10-4 μg/ml and the limit of concentration value was 0.014 mg/m3 on the assumption that sample size was 3 L.Relative standard deviations（RSDs） at three concentration levels of low,medium and high were 4.18%,4.25% and 6.87% respectively.The method was found to be a highly recovery which was more than 93.98% and perfect sample efficiency.Hexafluoropropylen was tested to be stable on the carbon tube for at least 5 days at room temperature and the rate of descent was 4.40% on the fifth day.Conclusion： The method was suitable and qualified according to Guide for Establishing Occupational Health Standards-Part 4：Determination Methods of Air Chemicals in Workplace,and it could be widely used for determination of hexafluoropropylenin workplace air.

关 键 词：六氟丙烯 工作场所空气 热解吸 气相色谱 

分 类 号：O657.71[理学—分析化学]