Carbon paste electrodes modified with Bi2O3 sensors for the determination of Cd and Pb

被引：141

作者：

Pauliukaite, R

Metelka, R

Svancara, I

Królicka, A

Bobrowski, A

Vytras, K

Norkus, E

Kalcher, K ^{[1
]}

机构：

[1] Karl Franzens Univ Graz, Inst Chem, A-8010 Graz, Austria

[2] Univ Pardubice, Fac Chem Technol, Dept Analyt Chem, Pardubice 53210, Czech Republic

[3] Univ Min & Met Krakow, Fac Mat Engn & Ceram, Dept Bldg Mat, PL-30059 Krakow, Poland

[4] Inst Chem, Dept Kinet & Catalysis, LT-2600 Vilnius, Lithuania

来源：

ANALYTICAL AND BIOANALYTICAL CHEMISTRY | 2002年 / 374卷 / 06期

关键词：

modified carbon paste electrode; Bi2O3; stripping voltammetry; cadmium; lead;

D O I：

10.1007/s00216-002-1569-3

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

Carbon paste electrodes bulk-modified with Bi2O3 were used for the determination of Cd(II) and Pb(II). The best composition was 1% (wt%) Bi2O3 in the paste. The measurements were made by differential pulse voltammetry in the potential range from -1.2 V to -0.3 V. The peak potential of the reoxidation of Cd is -0.85 V, and of Pb -0.60 V vs. SCE. The lowest concentration that could be determined was 5 mug L-1 of both metals (preconcentration time 240 s), the relative standard deviation was 3.5%-5.0% (four determinations). The correlation coefficient (r(2)) of the calibration curves was 0.9966 (for Cd) and 0.9971 (for Pb). The Bi2O3-modified electrode could be used for the analysis of drinking water, mineral water and urine.

引用

页码：1155 / 1158

页数：4

共 15 条

[1] Stripping voltammetry for the determination of trace metal speciation and in-situ measurements of trace metal distributions in marine waters [J].