作业场所空气中乙醚的溶剂解吸气相色谱法研究

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

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。

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.