偶氮化合物的极谱行为及痕量亚硝酸盐测定的研究  

Study on Polarographic Behaviour of Azo-compound and Determination of Trace Amount of Nitrite

作　　者：王耀光[1] 齐秀贞[1] 陈立 

机构地区：[1]福州大学化学系,福州350002

出　　处：《福建分析测试》1994年第1期18-22,共5页Fujian Analysis & Testing

摘　　要：本文研究了在氨性介质中,对氨基苯甲酸重氮盐与8-羟基喹啉形成偶氮化合物的最佳实验条件,并对电极反应机理作丁初步探讨,建立了一个灵敏、快速测定NO_2^-的新方法。大量NO_3^-存在不干扰。用于多种水样中痕量NO_2^-测定,获得满意结果,回收率为92％～100％。In this paper, the optimum experimental conditions of the azocompound formed by the nitrite-p-aminobenzoic acid-oxine in the ammonical medium and the mechanism of electrode reaction has been studied. A very sensitive and reproduceable 2.5th order differential electroanalytical method for determination of trace amounts nitrite in water is developed. The peak height is proportional to the concentration of nitrite over a range of 2 x 10^(-9)—4x10^(-7)g/ml. 5000-fold amount of nitrate does not interfere. Several water samples have been analyzed and the results conform to those by spectrophotometry. The recovery of nitrite ion is 92-100%.

关 键 词：亚硝酸盐 新极谱法 偶氮化合物 

分 类 号：O657.14[理学—分析化学]