Preconcentration and voltammetric determination of palladium (II) at sodium humate modified carbon paste electrodes

被引：22
|
作者：
Sun, QY [1 ]
Wang, CM [1 ]
Li, LX [1 ]
Li, HL [1 ]
机构：
[1] Lanzhou Univ, Dept Chem, Lanzhou 730000, Peoples R China
来源：
FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY | 1999年 / 363卷 / 01期
关键词：
D O I：
10.1007/s002160051150
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A chemically modified carbon paste electrode was prepared by incorporating appropriate amounts of sodium humate(NaA). Palladium(ll) was selectively accumulated in a solution of Britton-Robinson(B-R) buffer (pH 2.8) onto the electrode surface ill open circuit mode. The subsequent electrochemical measurement was carried out by cyclic voltammetry (CV) and linear sweep anodic stripping voltammetry (LSASV) in a supporting electrolyte of 1.0 M HCl. The obtained oxidation currents (I-pa1 and L-pa2) were proportional to the Pd(II) concentration in the range of 4.7 x 10(-6) - 9.4 x 10(-8) M. The developed method was applied to the quantitative determination of palladium in real samples.
引用
收藏
页码：114 / 117
页数：4
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