本文研究了测定亚硝酸盐的一种新的催化光度法。该方法基于—氯乙酸缓冲溶液中溴酸钾氧化灿烂绿受亚硝酸盐催化的褪色反应。在室温下进行,操作简便、选择性好,测定灵敏度为7. 44×10~(10)g/mL的亚硝酸盐。该方法应用于测定几种水样中亚硝酸盐含量,结果满意。相对标准偏差小于5.6％,加标平均回收率102.1％。 In this paper, a new catalytic spectrophotometry for the determination of nitrite was studied. The method is based on the oxidation of brilliant green by potassium bromate in a -chloroacetic acid buffer solution to nitrite-catalysed discoloration. At room temperature, easy to operate, good selectivity, determination of the sensitivity of 7. 44 × 10 ~ (10) g / mL of nitrite. The method was applied to the determination of nitrite in several water samples with satisfactory results. The relative standard deviation was less than 5.6%, and the average recovery rate was 102.1%.