A Voltammetric Approach for the Simultaneous Determination of Cd and Pb in Water Applying Carbon Paste Electrode Modified with Bismuth Film

被引：3
作者：
de Oliveira, Cristiane [1 ]
Maciel, Juliana Villela [1 ]
Christ-Ribeiro, Anelise [1 ]
Guarda, Ananda [2 ]
Dias, Daiane [1 ]
机构：
[1] Univ Fed Rio Grande, Lab Eletroespectro Analit LEEA, Escola Quim & Alimentos, BR-96203900 Rio Grande, RS, Brazil
[2] Univ Estado Minas Gerais, Rua Vereador Geraldo Moises da Silva S-N, BR-38302192 Ituiutaba, MG, Brazil
来源：
JOURNAL OF ANALYTICAL CHEMISTRY | 2022年 / 77卷 / 03期
关键词：
modified carbon paste electrode; bismuth film; cadmium; lead; water; ANODIC-STRIPPING VOLTAMMETRY; GLASSY-CARBON; CD(II); CADMIUM; PB(II); LEAD; COMPOSITE; DEPOSITION; SENSORS; METALS;
D O I：
10.1134/S1061934822030078
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
This study reports the simultaneous voltammetric determination of Cd and Pb by square wave voltammetry (SWV) using carbon paste electrode modified with bismuth film. For the ex situ film formation, the influence of Bi concentration, time and deposition potential was evaluated. Regarding the SWV parameters, frequency, amplitude, deposition time and deposition potential were evaluated. The ideal conditions of film formation were achieved with 1 mg/L Bi applying -0.6 V during 300 s (0.01 M acetate buffer, pH 4.6). The highest current values of Cd and Pb were obtained in 0.01 M acetate buffer (pH 4.6) with deposition potential of -1.1 V, time deposition of 180 s, frequency of 40 Hz, amplitude of 40 mV and potential step of 0.005 V. The detection limits calculated for Cd and Pb were 0.5 and 0.3 mu g/L, respectively, and the method was successfully applied to the analysis of commercial potable water.
引用
收藏
页码：369 / 375
页数：7
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