本文介绍隣硝基苯胺和亚硝酸盐在酸性条件下进行重氮化,产生的盐酸瞵硝基苯重氮化合物和盐酸萘乙二胺偶联,得到红紫色染料,萃入异戊醇中,在0.025—0.15ppm亚硝酸根浓度范围内服从比尔定律。本法灵敏度比标准方法约高30%。显色快、重现性强。不受PH和大部分外来离子干扰。用本法和标准方法分析河水和土壤样品,所得结果基 This article describes the o-nitroaniline and nitrite diazotization under acidic conditions, resulting nitrochlorobenzene nitrobenzene diazo compound and naphthyl ethylenediamine hydrochloride coupling to obtain a magenta dye, extracted into isoamyl alcohol, Beer’s law follows the nitrite concentration range of 0.025-0.15 ppm. The sensitivity of this method is about 30% higher than the standard method. Color fast, reproducible. Not subject to PH and most foreign ions interfere. River and soil samples were analyzed using this method and standard methods and the results obtained were based