期刊论文

Li, J.-H.

中文

冶金分析

1000-7571

2010

30

12

6-9

10.13228/j.issn.1000-7571.2010.12.001

(2006180):湖南省"十一五"重点建设学科 (09K099、10K0107):湖南省高校创新平台开放基金项目 (2009KG23、2009KG50):衡阳市科技局项目 (09A32):衡阳师范学院科学基金

本校为第一且通讯机构

基于羧基化多壁碳纳米管(c-MWCNT)修饰玻碳电极,建立了无汞测定痕量钯的新方法.在0.1 mol/L的HAc-NaAc缓冲液(pH 4.5)中,当Pd2+在羧基化多壁碳纳米管修饰玻碳电极表面于-1.1 V电位下富集30 s,电位扫速为100 mV/s时,该修饰电极在线性扫描伏安图上出现一灵敏的阳极溶出峰,峰电位为0.162 V.峰电流与Pd2+浓度在5.0×10-10~1.0×10-7mol/L范围内成良好的线性关系,其相关系数为0.999,方法检出限可达1.5×10-10mol/L.该修饰电极稳定性较好,可用于钯催化剂中钯含量的测定,回收率为98%~103%

A new mercury-free determination method of trace palladium was established based on carboxylic multiwall carbon nanotubes (c-MWCNT) modified glass carbon electrode. In 0.1 mol/L HAc-NaAc (pH 4.5) buffer solution, there was a sensitive anodic stripping peak on linear sweep voltammograms and the stripping peak potential was 0.162 V when accumulation time of Pd2+ at the modified electrode was 30 s at -1.1 V and potential scan rate was 100 mV/s. There was a good linear relationship between peak current and Pd2+ concentration in the range of 5.0×10...