本文阐述气相色谱法测定河水中痕量的亚硝酸盐。亚硝酸盐与取代苯胺、次磷酸反应生成苯的衍生物,用气相色谱检测。通过各种不同取代苯胺研究了亚硝酸盐的衍生物,用电子捕获检测器得到高响应值,而以硝基苯胺得率最高,用间硝基苯胺作为微量的亚硝酸盐的测定是最适宜的试剂。检出极限和测定范围在0.5ng/ml至1.00μg/ml比广泛采用的比色法(检出极限16ng/ml)更灵敏。 This article describes the determination of trace nitrite in water by gas chromatography. Nitrite and substituted aniline, hypophosphorous acid reaction of benzene derivatives, detected by gas chromatography. Nitrite derivatives were studied by various substituted anilines, with high electron-trapping detector yields, with the highest yield of nitroaniline, and the determination of m-nitroaniline as trace nitrite was the most suitable Of reagent. Detection limits and measurement ranges from 0.5 ng / ml to 1.00 μg / ml are more sensitive than the widely used colorimetric method (limit of detection 16 ng / ml).