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首页> 外文期刊>RSC Advances >Highly sensitive determination of lead(II) and cadmium(II) by a large surface area mesoporous alumina modified carbon paste electrode
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Highly sensitive determination of lead(II) and cadmium(II) by a large surface area mesoporous alumina modified carbon paste electrode

机译：通过大表面积介孔氧化铝改性碳浆电极高度敏感的铅（II）和镉（II）的测定

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摘要

Nanosized mesoporous gamma-alumina (M-gamma-Al2O3) was first prepared and then modified into a carbon paste to fabricate a novel modified carbon paste electrode. The prepared alumina has pores with an amorphous wall and large surface area. The electrochemical behavior of the modified carbon paste electrode was investigated using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) methods. The modified carbon paste electrode was employed to determine Pb2+ and Cd2+ simultaneously by a differential pulse voltammetry (DPV) method. Amperometric determination was carried out in 0.1 mol L-1 NaAc-HAc buffer solution (pH 6.0) after enriching for 360 s at -1.0 V. The oxidation peak currents of Pb2+ and Cd2+ were proportional to their concentration in the range of 0.001-10 mu mol L-1 and 0.01-10 mmol L-1, respectively. The detection limits of Pb2+ and Cd2+ were 0.20 nmol L-1 and 2.0 nmol L-1 (S/N = 3), respectively. The modified carbon paste electrode shows good stability, repeatability and sensitivity. The proposed method was applied to the determination of Pb2+ and Cd2+ in water samples with satisfactory results.
机译：纳米尺寸的孔的γ-氧化铝（M-γ-Al2O3的）首先制备，然后修改为碳糊来制造新型改性碳糊电极。所制备的氧化铝具有无定形的壁和大的表面积的孔隙。使用循环伏安法（CV）和电化学阻抗谱（EIS）方法修饰碳糊电极上的电化学行为进行了研究。改性碳糊电极用于确定Pb2 +和Cd2 +同时通过一个微分脉冲伏安法（DPV）方法。安培测定是在0.1摩尔L-1的NaAc-HAc缓冲液（pH6.0）后富集在-1.0 V.进行360秒Pb2 +和Cd2 +的氧化峰电流正比于它们的浓度在0.001-10的范围内亩摩尔L-1和0.01〜10毫摩尔L-1，分别。 Pb2 +和Cd2 +的检测限为0.20纳摩尔L-1和2.0纳摩尔L-1（S / N = 3），分别。改性碳糊电极显示出良好的稳定性，可重复性和灵敏度。所提出的方法应用于Pb2 +和Cd2 +的测定水样中，获得满意结果。

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  • 来源
    《RSC Advances》 |2018年第14期|共9页
  • 作者

    Zheng Xinyu; Chen Shen; Chen Jiebo; Guo Yuheng; Peng Jun; Zhou Xuechou; Lv Rixin; Lin Jiandi; Lin Ruiyu;

  • 作者单位

    Fujian Agr &

    Forestry Univ Sch Life Sci Fuzhou 350002 Fujian Peoples R China;

    Fujian Agr &

    Forestry Univ Sch Life Sci Fuzhou 350002 Fujian Peoples R China;

    Fujian Agr &

    Forestry Univ Sch Life Sci Fuzhou 350002 Fujian Peoples R China;

    Fuzhou Univ Coll Chem Fuzhou 350116 Fujian Peoples R China;

    Fujian Agr &

    Forestry Univ Sch Life Sci Fuzhou 350002 Fujian Peoples R China;

    Fujian Agr &

    Forestry Univ Sch Life Sci Fuzhou 350002 Fujian Peoples R China;

    Fujian Agr &

    Forestry Univ Sch Life Sci Fuzhou 350002 Fujian Peoples R China;

    Fujian Agr &

    Forestry Univ Sch Life Sci Fuzhou 350002 Fujian Peoples R China;

    Fujian Agr &

    Forestry Univ Sch Life Sci Fuzhou 350002 Fujian Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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