固相萃取-气相色谱法测定水中硝基氯苯类化合物

Determination of Nitrochlorobenzenes in Water by Gas Chromatography with Solidphase Extraction

建立固相萃取-气相色谱法测定水中15种硝基氯苯类化合物的方法。选用HLB柱为固相萃取柱,选用环己烷∶丙酮(3∶1,V∶V)混合溶剂作洗脱剂,得到方法检出限为0.011～0.040μg/L。空白水样加标回收率为73.6%～119%,相对标准偏差为6.1%～13.9%,精密度和准确度良好。对成分不复杂的实际水样进行测定,加标回收率为64.1%～118%,相对标准偏差为5.8%～15.6%,该方法能够基本满足成分不复杂的环境水体中痕量硝基氯苯类化合物的测定。

A method was developed for the determination of fifteen kinds of nitrochlorobenzenes in water by gas chromatography with solid-phase extraction.The optimal conditions were discussed in this research,the HLB column was selected as a solid phase extraction column,and a mixed solvent of cyclohexane:acetone(3∶1,V∶V)was used for elution.The detection limits ranged from 0.011μg/L to 0.040μg/L.The recoveries of spiked reagent water were 73.6%~119%,and the relative standard deviations were 6.1%~13.9%.The recoveries of the spiked actual water sample were 64.1%~118%,and the relative standard deviations were 5.8%~15.6%.The present method meets the requirement of determination of nitrochlorobenzenes in water samples with simple matrix.