铜(Ⅱ)与芳基取代酰基吡唑啉酮、腺嘌呤三元配合物吸附波的研究  

Study on the Adsorptive Wave of Triple Complex of Copper(Ⅱ) with Aryl-acylpyrazalone and Adenine

作　　者：张丹[1] 李锦州[1] 张永[1] 

机构地区：[1]哈尔滨师范大学化学系,黑龙江哈尔滨150025

出　　处：《分析测试学报》2008年第5期553-556,共4页Journal of Instrumental Analysis

基　　金：黑龙江省教育厅科研项目(11521061);哈尔滨市科技创新人才研究专项资金资助项目(2006RFXXG019)

摘　　要：在HAc—NaAc缓冲溶液中（pH5．0），用单扫示波极谱法得到1-对氯苯基-3-呋喃基4-呋喃甲酰基-5-吡唑啉酮（HL）、腺嘌呤（Ade）与铜（Ⅱ）三元配合物的灵敏吸附波，其峰电位为-0．58V（vs.SEC）。峰电流与铜质量浓度在0．02～10mg／L范围内分段呈线性关系，定量下限为2μg/L（3×10^-8mol／L）。采用多种电化学方法研究了极谱波的性质和电极反应机理。峰电流由中心离子铜（Ⅱ）还原产生。用直线法测得多元配合物组成比为1：1：1，表观稳定常数为7×10^7。此方法已用于粗盐、麦片和化妆品中痕量铜的测定，标准回收率98％～103％．A sensitive adsorptive wave of triple complex of copper（ Ⅱ ） with 1-（p-ehlorophenyl）-3- furyl-4- （2-furoyl） -5-pyrazolone （HL） and adenine （ Ade ） in HAe - NaAe buffer solution （ pH 5.0 ） was obtained by single sweep polarography. The peak potential is - 0. 58 V （vs. SEC）. The peak current exhibited a linear relation with the concentration of Cu （ Ⅱ ） in the range of 0.02 - 10 mg/L and the detection limit was 2 μg/L（3 × 10^-8 mol/L）. The features of the polarographie wave and the mechanism of electrode reaction were studied using a variety of electrochemical methods, it was shown that the peak current produced was derived from the reduction of Cu （ Ⅱ ） , the central ion. The molar ratio of Cu（ Ⅱ ） with Ade and HL in the complex was 1 ： 1 ： 1, and the apparent stability constant of the complex was 7×10^7. The method has been used to determine copper in crude salt, cornmeal and cosmetic samples. The recovery range was 98%- 103% .

关 键 词：1-对氯苯基-3-呋喃基4-呋喃甲酰基-5-吡唑啉酮 腺嘌呤 铜 配合物吸附波 

分 类 号：O657.1[理学—分析化学]