化学
电化学
电极
离子液体
六氟磷酸盐
铊
分析化学(期刊)
电化学气体传感器
石墨烯
伏安法
无机化学
方波
选择性
纳米技术
物理化学
色谱法
材料科学
物理
催化作用
电压
量子力学
生物化学
作者
Hasan Bagheri,Abbas Afkhami,Hosein Khoshsafar,Mosayeb Rezaei,Seyyed Javad Sabounchei,Mehdi Sarlakifar
标识
DOI:10.1016/j.aca.2015.03.004
摘要
In the present manuscript, an electrochemical sensor for the sensitive detection of Tl+, Pb2+ and Hg2+ is described. A new composite electrode has been fabricated using graphene, 1-n-octylpyridinum hexafluorophosphate (OPFP), and [2,4-Cl2C6H3C(O)CHPPh3] (L), as a new synthetic phosphorus ylide. The physicochemical and electrochemical characterizations of fabricated sensor were investigated in details. The advantages of the proposed composite electrode are its ability in simultaneous electrochemical detection of Tl+, Pb2+ and Hg2+ with good selectivity, stability and no need for separating of the three species from complex mixtures prior to electrochemical measurements. The analytical performance of the proposed electrode was examined using square wave voltammetry. Tl+, Pb2+ and Hg2+ can be determined in linear ranges from 1.25 × 10−9 to 2.00 × 10−7 mol L−1. Low detection limits of 3.57 × 10−10 mol L−1 for Tl+, 4.50 × 10−10 mol L−1 for Pb2+ and 3.86 × 10−10 mol L−1 for Hg2+ were achieved. Finally, the proposed electrochemical sensor was applied to detect trace analyte ions in various water and soil samples with satisfactory results.
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