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研究在亚硝酸根催化下溴酸钾氧化溴甲酚绿的褪色反应，并据此建立一种测定痕量亚硝酸根的新催化光度法。该方法在室温下进行，操作尤为方便，有良好的选择性，线性范围为０～０．３２ｍｇ／Ｌ，亚硝酸根（ＮＯ－２）的检出限为０．１２７μｇ／Ｌ。应用于几种环境水样中痕量亚硝酸根的测定时，相对标准偏差小于４．５％，水样加标回收率平均为１００．１％
To study the fading reaction of bromocresol green by potassium bromate catalyzed by nitrite and to establish a new catalytic spectrophotometric method for the determination of trace nitrite. The method was carried out at room temperature, the operation was particularly convenient, with good selectivity, the linear range of 0 ~ 0.32mg / L, nitrite (NO-2) detection limit of 0.127μg / L. When applied to the determination of trace nitrite in several environmental water samples, the relative standard deviation (RSD) was less than 4.5%, the average recoveries of water samples were 100.1%