测定水和废水中亚硝酸盐的分光光度分析法,是基于Griess-Ilosvay反应。为了提高灵敏度,采用溶剂萃取。本文介绍邻硝基苯胺和亚硝酸根,在酸性条件下进行重氮化,产生的氯化硝基苯重氮化物再和盐酸萘乙二胺偶联,得到红紫色染料,萃取于异戊醇中,在0.025～0.15ppm范围的亚硝酸根服从比尔定律。本法灵敏度比标准方法约高30％,显色快,重现性好,不受pH和大部分外来离子影响。用本法和标准方法分析河水和土壤样品,所得 The spectrophotometric method for the determination of nitrite in water and wastewater is based on the Griess-Ilosvay reaction. To increase the sensitivity, solvent extraction is used. This article describes the o-nitroaniline and nitrite, diazotization under acidic conditions, the resulting nitrochlorobenzene diazide and then naphthyl ethylenediamine hydrochloride coupling to obtain a magenta dye, extracted in isoamyl alcohol , Nitrite in the range of 0.025-0.15 ppm obeys Beer’s law. Sensitivity of this method is about 30% higher than the standard method, fast color rendering, good reproducibility, free from pH and most of the external ions. Use this method and standard methods to analyze river and soil samples