期刊论文

Deng Pei-Hong

中文

分析化学

0253-3820

2008

36

5

691-694

10.3321/j.issn:0253-3820.2008.05.026

本文系衡阳市科学技术局科技计划（No.20074J001）和衡阳师范学院科学基金（No.07A19）资助项目

本校为第一且通讯机构

制备了多壁碳纳米管修饰碳糊电极并研究了锆-茜素红络合物在该电极上的阳极吸附伏安行为,采用二阶导数线性扫描伏安法进行分析,实验结果表明,在0.128 mol/L氨基乙酸-0.048 mol/L邻苯二甲酸氢钾缓冲液(pH 4.0)中,在200 mV富集60 s,在200～1200 mV范围内以200 mV/s的速率线性扫描,络合物吸附在该修饰电极表面,于832 mV(vs.SCE)处产生一个灵敏的氧化峰,为络合物中配体茜素红的氧化所产生.络合物的峰电流与锆的浓度在1.0×10~(-11)～2.0×10~(-7) mol/L范围内呈良好的线性关系;检出限(S/N=3)为6.0×10~(-12) mol/L(富集时间180 s).方法用于岩矿样品中痕量锆的测定,结果满意.

A novel method for the determination of ultra trace amount of zirconium was described. A multiwalled carbon nanotube modified carbon paste electrode was prepared and the anodic adsorption voltammetric behavior of the zirconium-alizarin red S (ARS) complex at the modified electrode was investigated. By second derivative linear sweep technique, it was found that in 0.128 mol/L glycine and 0. 048 mol/L potassium biphthalate buffer solution (pH 4. 0), the complex could be adsorbed on the surface of the electrode after accumulating at 200 mV for 60 ...