钯在脱乙酰壳多糖化学修饰电极上的电化学行为及分析应用

北京大学学报（自然科学版）

钯在脱乙酰壳多糖化学修饰电极上的电化学行为及分析应用

王艳,叶宪曾,李南强

北京大学化学学院，北京，100871

收稿日期:1995-08-31 出版日期:1996-07-20 发布日期:1996-07-20

Electrochemical Behaviours of Palladium(Ⅱ) on Chitosan Chemically Modified Electrode and Its Analytical Application

WANG Yan, YE Xianzeng, LI Nanqiang

Department of Chemistry, Peking University, Beijing, 100871

Received:1995-08-31 Online:1996-07-20 Published:1996-07-20

摘要/Abstract

摘要： 提出用脱乙酰壳多糖化学修饰电极为工作电极，阳极溶出伏安法测定痕量钯。在pH＝2的KCl-HCl底液中，+0.0V富集2min，以0.1V/s扫速阳极溶出，峰电位在0.67V(vs.SCE),Pd在0.075～9.9mg/L范围内与峰高呈良好的线性关系，相关系数r=0.9993。在富集10min时,可检测1.5μg/LPd，大大提高了测定灵敏度。样品测定结果满意。同时研究了该体系的电化学性质和电极过程机理。

关键词: 脱乙酰壳多糖, 化学修饰电极, 钯, 阳极溶出伏安法

Abstract: A chitosancontaining glassy carbon electrode was found to give highly sensitive voltammetric wave for Pd(Ⅱ)-KCl-HCl system by anodic stripping voltammetry. Various conditions for the determination of trace Pd(Ⅱ) were studied. The optimum chitosan amount in glassy carbon was 1% 4 μL. In a solution of 0.02 mol/L KCl-HCl(pH=2), at 0.0 V, electrodeposited for 2 min or 1 min, scan rate was 0.1 V/s, the anodic stripping peak potential was at +0.67 V(vs.SCE). The peak current is proportional to the Pd(Ⅱ) concentration between 0.075-9.9 mg/L, r=0.999 3. 1.5 μg/L Pd(Ⅱ) was determined by electrodeposition for 10 min. The method was applied to the determination of palladium in catalyst. The possible mechanism of electrochemical reaction has been proposed by study of CV and UV.

Key words: chitosan, chemically modified electrode, palladium, anodic stripping voltammetry

中图分类号:

O657.14

王艳,叶宪曾,李南强 . 钯在脱乙酰壳多糖化学修饰电极上的电化学行为及分析应用[J]. 北京大学学报（自然科学版）.

WANG Yan,YE Xianzeng,LI Nanqiang. Electrochemical Behaviours of Palladium(Ⅱ) on Chitosan Chemically Modified Electrode and Its Analytical Application[J]. Acta Scientiarum Naturalium Universitatis Pekinensis.

导出引用管理器 EndNote|Ris|BibTeX

链接本文: https://xbna.pku.edu.cn/CN/

https://xbna.pku.edu.cn/CN/Y1996/V32/I4/407

[1]	陶虎春, 黄帅斌, 谷翼涵, 张丽娟, 朱丽丽. 表面修饰多孔微晶玻璃的制备及其对废水中钯(II)的吸附分离[J]. 北京大学学报自然科学版, 2019, 55(2): 360-366.
[2]	陶虎春, 刘威, 黄帅斌, 程玲. 一种钯离子印迹聚合物的制备优化研究[J]. 北京大学学报自然科学版, 2018, 54(4): 907-914.
[3]	赵华波,张朝晖. 选择性湿法刻蚀制备内嵌碳纳米管的沟槽结构[J]. 北京大学学报（自然科学版）, 2012, 48(3): 354-358.
[4]	吉望西, 陈瓞延, 林琴如, 马万云. LEAFS对海洋沉积物中金钯元素的测量[J]. 北京大学学报（自然科学版）, 1997, 33(2): 163-166.
[5]	叶宪曾,陈鼎峰. 铕(Ⅲ)－8－羟基喹啉体系在Nafion化学修饰电极上的电化学行为[J]. 北京大学学报（自然科学版）, 1995, 31(2): 166-172.