吸光光度法测定亚硝酸盐通常采用重氮化偶合分光光度法 ,此方法虽灵敏度高 ,但所用试剂毒性太大。本文提出催化动力学光度法测定亚硝酸盐的新方法 ,试验结果表明 ,在酸性介质中 ,亚硝酸盐具有溴酸盐氧化甲哌氯丙嗪的作用。采用固定时间法测定体系的吸光度值 ,用于食品和水中Ｎ Spectrophotometric determination of nitrite is usually diazotized coupling spectrophotometry, although this method is highly sensitive, but the reagents used are too toxic. In this paper, a new method for the determination of nitrite by catalytic kinetic spectrophotometry is proposed. The experimental results show that nitrite has the effect of bromate oxidation of meclofenpromazine in acidic media. The fixed time method was used to determine the absorbance of the system for food and water N