对-氨基二甲替苯胺-H酸氧化偶联反应的研究及应用  

Study on the Oxidative Coupling of p-Amino-N,N-dimethylaniline with 1-Amino-8-naphthol-3,6-disulfonic Acid and Its Application

作　　者：黄湘源[1] 陈虹[1] 

机构地区：[1]南昌大学化学系,江西南昌330047

出　　处：《光谱学与光谱分析》2002年第4期627-630,共4页Spectroscopy and Spectral Analysis

基　　金：江西省自然科学基金 (Z 12 49)资助

摘　　要：在pH =5 7混合酸 氢氧化钠缓冲介质中 ,研究了铬 (Ⅵ )催化过氧化氢氧化对 氨基二甲替苯胺盐酸盐和H酸 钠盐的氧化偶联反应及其机理 ,建立了催化光度法测定痕量铬 (Ⅵ )的新方法。该方法线性范围为0 0 8～ 0 4 0mg·L-1 ,检出限为 2 0× 10 -6g·L-1 ,相对标准偏差为 1 1% ,直接用于废水中铬 (Ⅵ )的测定 。A new catalytic spectrophotometic method for the determination of trace chromium is reported in this paper. The method is based on the catalytic action of chromium on the oxidative coupling of p-Amino-N, N-dimethylaniline dihydrochloride and 1-Amino-8-naphthol-3,6-disulfonic acid to form a colored dye (lambda(max) = 516 run) in the presence of hydrogen peroxide. The mechanism of the reaction was discussed and its optimum conditions were established. The linear range of this method was 0.08-0.40 mg.L-1 and the relative standard deviation was found to be 1.1% for Cr(VI) (11 replicates). The detection limit for Cr(VI) is 2.0 x 10(-6) g.L-1. The method was used to determine Cr(VI) in waste water successfully.

关 键 词：氧化偶联反应 催化光度法 对-氨基二甲替苯胺盐酸盐 H酸-钠盐 铬(Ⅵ) 污染物分析 废水测定 

分 类 号：X132[环境科学与工程—环境科学] O614.611[理学—无机化学]