数字农科院2.0

Determination Of Trace Lead And Cadmium In Decorative Material Using Disposable Screen-Printed Electrode Electrically Modified With Reduced Graphene Oxide/L-Cysteine/Bi-Film

文献类型： 外文期刊

作者： Hou, XP; Xiong, BH; Wang, Y; Wang, L; Wang, H

作者机构：

关键词： sensor; heavy metals; bismuth film; DSPE; L-cysteine; decorative material; reduced graphene oxide

期刊名称： SENSORS

ISSN：

年卷期： 2020 年 20 卷 5 期

页码：

收录情况： JCR（2021版） ; EI（2021版）

摘要： Cadmium (Cd) and lead (Pb) in decorative materials threaten human health. To determine the content of Cd(II) and Pb(II), a disposable screen-printed electrode (DSPE) electrically modified with reduced graphene oxide (rGO) and L-cysteine (LC) was fabricated, which was further electroplated with bismuth film (Bi/LC-rGO/DSPE) in situ. The electrochemical properties of this electrode were studied using cyclic voltammetry, electrochemical impedance spectroscopy, linear sweep voltammetry and differential pulse voltammetry. The results indicated that the Bi/LC-rGO/DSPE had excellent sensitivity, selectivity and stability with low cost and easy production. After optimizing the detection parameters, the linear range of the Bi/LC-rGO/DSPE was from 1.0 to 30.0 mu g/L for Cd(II) and Pb(II), and the detection limits were 0.10 mu g/L for Cd(II) and 0.08 mu g/L for Pb(II). Finally, the Bi/LC-rGO/DSPE was applied to determine the concentrations of Cd(II) and Pb(II) in different decorative materials where the recoveries were in the range from 95.86% to 106.64%.

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