气相色谱法同时测定工作场所中异亚丙基丙酮和苯系物  

Determination of mesityl oxide and benzene,toluene and xylene in workplace air by gas chromatography

作　　者：胡红梅[1] 胡彬彬[1] 李芳[1] 谢宏斌[1] 

机构地区：[1]湖南省衡阳市疾病预防控制中心,湖南衡阳421001

出　　处：《中国卫生检验杂志》2012年第9期2063-2065,共3页Chinese Journal of Health Laboratory Technology

摘　　要：目的:建立工作场所空气中异亚丙基丙酮、苯、甲苯、二甲苯的气相色谱同时测定方法。方法:工作场所空气用管采集,0.5%甲醇的二硫化碳溶液解吸,程序升温初始35℃保持7 min,以30℃/min升温至120℃保持5 min,载气流量1.0 ml/min,HP-5毛细管色谱柱分离,FID检测。结果:各组分离效果好,解吸效率分别为92.3%～98.6%,在线性范围内,浓度与峰面积呈良好线性(r=0.999),回收率分别为90.5%～97.6%,检出限分别0.3μg/ml～1.2μg/ml,相对标准偏差(RSD)均小于5.0%。结论:该方法简便、灵敏、准确。适用于三苯及异亚丙基丙酮混合污染的喷漆业、制鞋业等行业工作场所空气的检测。Objective：To establish a method for determination of mesityl oxide and benzene and xylene in workplace air by gas chromatography.Methods： The target chemicals in air were sampled by active carbon tube and desorbed by solvent of 0.5% methanol in carbon disulfide.The separation was performed on HP-5 capillary column with the programmed temperature initial at 35℃ for 7 min and then increasing to 120℃ by 30℃/min for 5 min.The flowrate of carrier gas was 1.0 ml/min,and the chemicals were detected with flame ionization detector.Results： The result showed that the separation of benzene,toluene,Mesityl oxide,m-xylene,p-xylene,o-xylene was good.The desorptive efficiency attained 92.3%~98.6%.Thecalibyation curve was linear in the concentration（r=0.999） and the recoveries was 90.5%~97.6%,detection limit was（0.3~1.2）μg/ml,RSD was less than 5.0%.Conclusion： This method is simple,sensitive and applicable for determination of the chemicals in workplace air of paint industry,footwear industry and others.

关 键 词：气相色谱 FID 工作场所 异亚丙基丙酮 苯 甲苯 二甲苯 

分 类 号：O657.71[理学—分析化学]