Single drop microextraction and gas chromatographic determination of volatile halogenated hydrocarbons

摘要

A simple, rapid and inexpensive procedure for extraction of volatile halogenated hydrocarbonsby headspace single drop microextraction is presented. Decane was selected as the extractingsolvent. The operation parameters such as organic drop volume, sample stirring rate, extractiontime, salt concentration were optimized. Quality parameters of the method were determined.The repeatability of the method was 5.0-6.5%. Calibration graphs were linear up to 50 pg 1-'(R~20.995) and detection limits ranged from 0.42 to 1.78 μg l~(-1). For all the target compounds,the limits of detection were much lower than the maximum contaminant level permitted indrinking water. The proposed technique was applied for volatile halogenated hydrocarbon de-termination in groundwater.