本文采用毛细管气相色谱法，选用一根ＦＦＡＰ为固定液的毛细管柱，以邻苯二甲酸二丙酯为内标物，ＦＩＤ检测器，分离和测定复硝酚钠水剂中邻硝基苯酚钠、对硝基苯酚钠、５－硝基邻甲氧基苯酚钠。样品经酸化，用乙酸乙酯萃取，测得复硝酚钠水剂中的有效成分邻硝基苯酚、对硝基苯酚、５－硝基邻甲氧基苯酚的标准偏差分别为：０．０１５、０．０１６、０．００９；变异系数分别为：２．３４％、１．２２％、２．８８％；回收率均在９８．４～１００．２％。 In this paper, capillary gas chromatography was used to select a stationary phase capillary column FFAP to dipropyl phthalate as the internal standard, FID detector, separation and determination of sodium nitrophenolate sodium nitrophenolate solution , Sodium p-nitrophenolate, sodium 5-nitro-o-methoxyphenol. The samples were acidified and extracted with ethyl acetate. The standard deviations of o-nitrophenol, p-nitrophenol and 5-nitro-o-methoxyphenol were respectively found to be 0.015 , 0.016,0.009 respectively; the coefficient of variation were 2.34%, 1.22% and 2.88%, respectively. The recoveries ranged from 98.4% to 100.2%.