痕量铁催化对氨基二甲替苯胺-H酸显色反应  

Catalysis of Trace Iron on the Colouring Reaction of p-Amino-N,N-dimethylaniline with 1-Amino-8-naphthol-3,6-disulfonic Acid

作　　者：黄湘源[1] 陈虹[1] 

机构地区：[1]南昌大学化学系,南昌330047

出　　处：《分析化学》2003年第2期175-177,共3页Chinese Journal of Analytical Chemistry

基　　金：江西省自然科学基金资助项目(Z-1249)

摘　　要：研究了在pH =5 .7混合酸 氢氧化钠缓冲介质中 ,铁 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 ,考察了反应的最佳条件 ,建立了催化动力学光度法测定痕量铁 的新方法。该方法线性范围为 0 .0 0～ 0 .0 2mg L ;检出限为 2 .1× 1 0 - 7g L。直接用于自来水及湖水中铁 的测定 。A new catalytic spectrophotometric method for the determination of trace iron? has been developed. The method is based on the catalytic action of trace iron? on the oxidative coupling of p-amino-N,N-dimethylaniline dihydrochloride and 1-amino-8-naphthol-3,6-disulfonic acid by hydrogen peroxide in mixed acid and sodium hydroxide medium at pH 5.7.Its optimum conditions were established. The linear range of this method was 0.00～0.02 mg/L. The detection limit for trace iron? is 2.1×10 -7 g/L. The method was used to determine trace iron? in tap water and lake water successfully.

关 键 词：催化光度法 对-氨基二甲替苯胺盐酸盐 1-氨基-8-萘酚-3 6-二磺酸钠 铁(Ⅲ) 

分 类 号：O657.3[理学—分析化学]