建立了自制活性炭纤维固相微萃取与气相色谱联用测定海水中6种硝基苯类和环酮类化合物的分析方法.优化的萃取条件为:样品中加NaCl至饱和,在 1500 r/min 速率搅拌下,于60 ℃水浴中顶空萃取30 min,于280 ℃下解吸2 min.方法的线性范围为0.01~400 μg/L,检出限为1.4~3.2 ng/L,相对标准偏差(RSD,n=6)为1.4% ~7.8% .海水样品中硝基苯类和环酮类化合物的加标回收率和RSD分别为86.3% ~101.8%和3.7% ~7.8% .应用所建立的方法对东海近岸表层水样进行测定,其中硝基苯、1,3-二硝基苯、2,6-二硝基甲苯的质量浓度分别为0.756,0.944,0.890 μg/L.实验结果表明,该方法简便、高效、无需有机溶剂,适合于海洋水体中硝基苯类和环酮类化合物的分析.
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