铜(Ⅱ)催化过氧化氢氧化5-Cl-PADAT褪色反应的动力学研究及其应用  

Catalytic kinetic spectrophotometric determination of trace copper(Ⅱ) with 5-Cl-PADAT

作　　者：张昕[1] 安娜[2] 陈长芬[3] 

机构地区：[1]陕西师范大学化学与材料科学学院,西安710062 [2]福建农林大学亚热带果树研究所,福州350002 [3]陕西省血液中心,西安710061

出　　处：《分析试验室》2004年第10期58-60,共3页Chinese Journal of Analysis Laboratory

摘　　要：在KH2PO4 NaOH介质中研究了铜(Ⅱ)催化H2O2氧化5 Cl PADAT的褪色反应,测定了反应动力学参数,并建立了测定痕量铜的新方法。本法检出限为6.25×10-11g mL,铜(Ⅱ)的质量浓度在0～2.24ng mL范围内与log(A0 A)呈良好的线性关系。该法已用于核桃、人发样中痕量铜的测定。The discoloring reaction of 5-〔2-(5-chloropyridine) azo〕-2,4-diaminotoluene (5-Cl-PADAT) with hydrogen peroxide catalyzed by trace Cu(Ⅱ)in pH 7.5 of KH_2PO_4-NaOH solution was studied. The order of the reaction and the apparent activation energy were determined. A new method for determining trace Cu(Ⅱ) was established. The detection limit was 6.25×10^(-11) g/mL, and linear range was 0～2.24 ng/mL, a linear relationship existed between the concentration of Cu(Ⅱ) and log(A_0/A). The method was applied to the determination of Cu(Ⅱ) in samples with satisfactory results.

关 键 词：铜 过氧化氢 5-Cl-PADAT 褪色反应 催化动力学分光光度法 

分 类 号：O614.121[理学—无机化学] O657.3[理学—化学]