作业场所空气中乙醚的溶剂解吸气相色谱法研究

目的:建立作业场所空气中乙醚的溶剂解吸气相色谱测定方法。方法:用溶剂解吸型活性炭管采样空气中的乙醚,二硫化碳解吸,经DB-FFAP毛细管色谱柱分离,FID检测器测定。结果:乙醚在0μg/ml～3408μg/ml呈良好的线性关系,线性相关系数为0.99998,方法检出限为1.36μg/ml,相对标准偏差0.24%～4.9%,解吸效率为84%～92%,采样效率为100%,加标回收率在97%～99%,穿透容量为2.9 mg,在4℃冰箱中样品至少可稳定10 d。结论:该方法各项指标均能达到《工作场所空气中毒物检测方法研究规范》的要求,现场应用试验也得到了相符性结论。该方法适用于工作场所空气中乙醚的检测。

Solution analytical-gas chromatographic method for determination of ethyl ether in workplace air

Objective: To establish a method for the determination of ethyl ether in workplace by solution analytical-gas chromatography.Methods: The samples were absorbed by activated carbon and desorbed by carbon disulfide.The DB-FFAP capillary column and FID detector were selected to determine the compounds.Results: Calibration curve of the method was linear within the range 0 μg/ml～3408 μg/ml and showed good linearity with r=0.99998.The determination limit of the method was 1.36 μg/ml.The relative standard deviation(RSD) was 0.24%～4.9%.The desorption efficiencies were 84%～92% and the sample efficiency was 100%.Recoveries were between 97%～99%.The maximum absorbency of ethyl ether was 2.9 mg.The samples could be stably stored for at least 10 days.Conclusion: This method is conformed with the requirements of the"Standardization of Methods for Determination of Toxic Substance in the Workplace Air".It is feasible for determination of ethyl ether in workplace air.