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研究了在强酸介质中亚硝酸根催化溴酸钾氧化酸性品红的褪色反应及其动力学条件，建立了高灵敏测定痕量亚硝酸根的新催化光度法。方法灵敏度为３．７×１０￣（－１１）ｇ／ｃｍ￣２亚硝酸态氨（△Ａ＝０．００１，ｂ＝１ｃｍ），线性范围为０．０６～０．４２μｇ／１０ｍＬ，用于测定唾液及硝酸钾中亚硝酸根。
The fading reaction and kinetic conditions of acidic magenta catalyzed by potassium bromate catalyzed by nitrite in a strong acid medium were studied. A new catalytic spectrophotometric method for the determination of trace nitrite with high sensitivity was established. The sensitivity of the method was 3.7 × 10 ~ (-11) g / cm ~ 2, and the linear range was 0.06 ~ 0.42μg / 10mL for ammonia in nitrite (△ A = 0.001, b = Determination of saliva and potassium nitrate in nitrite.