文献类型：期刊文献

英文题名：Determination of Trace Lead and Cadmium in Decorative Material Using Disposable Screen-Printed Electrode Electrically Modified with Reduced Graphene Oxide/L-Cysteine/Bi-Film

作者：Hou, Xiaopeng[1,2] Xiong, Benhai[3] Wang, Yue[3] Wang, Li[4] Wang, Hui[1,2,3]

第一作者：侯晓鹏

通信作者：Wang, H[1];Wang, H[2];Wang, H[3]

机构：[1]Chinese Acad Forestry, Res Inst Forestry New Technol, Beijing 100091, Peoples R China;[2]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[3]Chinese Acad Agr Sci, Inst Anim Sci, State Key Lab Anim Nutr, Beijing 100193, Peoples R China;[4]Geog Informat Ctr Yulin City, Shannxi 719000, Peoples R China

年份：2020

卷号：20

期号：5

外文期刊名：SENSORS

收录：;EI(收录号：20201008274872);Scopus(收录号：2-s2.0-85080968657);WOS:【SCI-EXPANDED(收录号:WOS:000525271500084)】；

基金：This work was supported by the Science and Technology Major Project of Guangxi (GUIKE AA17204087-13), Key Realm R&D Program of Guangdong Province (No. 2019B020215004) and Chinese National Natural Science Foundation (No. 31671578).

语种：英文

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

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%.