工作场所空气中三溴甲烷测定的溶剂解吸气相色谱法  

Determination of bromoform in the air of workplace by solvent desorption gas chromatography

作　　者：李小娟[1] 朱宝立[1] 吴健[1] 周长关 龚伟[1] 

机构地区：[1]江苏省疾病预防控制中心,南京210009

出　　处：《中华劳动卫生职业病杂志》2016年第4期299-301,共3页Chinese Journal of Industrial Hygiene and Occupational Diseases

基　　金：江苏省医学领军人才项目（LJ201130）;2015年卫生标准制（修）订项目计划（20150703）

摘　　要：目的 建立工作场所空气中三溴甲烷的溶剂解吸毛细管柱气相色谱测定方法.方法 活性炭管吸附空气中三溴甲烷,用二硫化碳解吸后毛细管柱气相色谱分离、火焰离子化检测器测定.结果 三溴甲烷浓度在0.57～300.00 μg/ml范围内线性关系良好,回归方程为y=1.22x-0.81,相关系数为0.999 9.定性检出限为0.17 μg/ml,若采集3.0 L空气样品,则最低检出浓度为0.06 mg/m3.批内、批间相对标准偏差（RSD）分别为1.7％～3.6％、2.8％～6.3％;采样效率为100％,平均解吸效率为95.0％,穿透容量大于0.61 mg（100 mg活性炭）.结论 该方法适用于工作场所空气中三溴甲烷浓度的测定.Objective To establish the method of solvent desorption gas chromatography for determination of bromoform in workplace air.Methods Bromoform in the air was adsorbed by activated carbon tube sampling and solvent desorption using carbon disulfide,then analyed by GC with DB-FFAP capillary column.Results The linear regression equation is y=1.22x-0.81 （r=0.999 9） between 0.57～300.00 μg/ml of target concentration in the air.The detection limit was 0.17 μg/ml.The relative standard deviations of the batch and inter batch were 1.7%～3.6%,2.8%～6.3%,respectively.The sampling efficiency was 100%.The overall desorption efficiency was 95.0%.The breakthrough capacity was more than 0.61 mg （100 mg activated carbon）.Conclusion The method is suitable to determine bromoform in the air of workplace.

关 键 词：三溴甲烷 工作场所 溶剂解吸 色谱法 气相 

分 类 号：R134.4[医药卫生—劳动卫生]