气相色谱/电子捕获检测器法对胶粘剂中卤代烃的测定

Determination of Halogenated Hydrocarbons in Adhesives by Gas Chromatography Coupled with Electron Capture Detector

胶粘剂样品经乙酸乙酯超声波萃取、过滤后,以三溴甲烷为内标物,采用气相色谱/电子捕获检测器法(GC/ECD)测定其中7种卤代烃的含量。结果表明,该法对卤代烃的定量下限为0.005～2mg/L,样品加标回收率为95%～102%。4个实验室对氯丁胶中卤代烃测定的相对标准偏差为2.5%～4.2%。

7 halogenated hydrocarbons in adhesives were determined with broinoform as internal standard by gas chromatography coupled with micro-electron capture detector（GC/ECD） after ethyl acetate uhrasonic extraetinn and filtration. The detection limit of this method for halogenated hydrocarbons ranged from 0. 005 mg/L to 2 mg/L. The recoveries ranged from 95% to 102% . Results of the determination of halogenated hydrocarbons in the neoprene adhesive showed that the relative standard deviations between 4 laboratories were in the range of 2.5% - 4. 2% .