工作场所空气中甲基叔丁基醚的气相色谱-质谱法测定

GC-MS determination for methyl tert-butyl ether in workplace air

目的：建立工作场所空气中甲基叔丁基醚（MTBE）测定方法。方法：空气中MTBE用活性碳管吸附采集,二硫化碳解吸,FFAP弹性石英毛细管柱分离,质谱SIM方式检测。结果：MTBE浓度在0-962.9μg/ml范围内呈良好线性关系,r=0.9998,最低检出限0.68μg/ml,相对标准偏差（RSD）为0.2%-0.6%,解吸效率为90.5%-104.1%。样品在室温下至少可保存7 d。结论：该方法各项指标均达到《工作场所空气中毒物检测方法的研制规范》的要求,适用于工作场所空气中MTBE的检测。

Objective：To establish a GC/MS analytical method for methyl tert-butyl ether（MTBE） in the workplace air.Methods：Absorbite was used to Absorb MTBE.Sample was desorbed by CS2,separated by FFAP resilience quartz capillary column and detected with mass spectra SIM.Results：The liner calibration cure showed a good correlation（r=0.9998） between 0 to 962.9 μg/ml,and the detection limit was 0.68 μg/ml.RSD between 0.2% to 0.6%.Desorption efficiency was 90.5%～104.1%.The sample could still remain stable under ambient temperature until 7 d.Conclusion：This method can be used to determine the concentration of MTBE in the workplace air.