毛细管柱气相色谱法测定水中氯苯类化合物

提出了应用毛细管气相色谱法测定水样中11种氯苯类化合物。水样以石油醚提取,用AC-20毛细管柱分离,经电子捕获检测器检测。11种氯苯类化合物的质量浓度均在一定的范围内与其峰高呈线性关系,方法的检出限(3S/N)在0.005～0.038μg.L-1之间。方法用于饮用水和水源水中氯苯类化合物的测定,加标回收率在85.2%～101.0%之间,测定值的相对标准偏差(n=8)在3.4%～5.2%之间。

Capillary Column-GC Determination of Chlorobenzenes in Water

Capillary column-GC was applied to the determination of 11 chlorobenzenes in water.The sample was extracted with petroleum ether,and the extract were separated on AC-20 capillary column and detected by ECD.Linear relationships between values of peak height and mass concentration of 11 chlorobenzenes were obtained in definite ranges,with detection limits(3S/N) in the range of 0.005-0.038 μg·L-1.The proposed method was used in the determination of chlorobenzenes in drinking water and source water,giving values of recovery obtained by standard addition method in the range of 85.2%-101.0%,and RSD′s(n=8) in the range of 3.4%-5.2%.