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首页> 外文期刊>Electroanalysis >Simultaneous Determination of Peroxide Hydrogen and Ascorbic Acid by Capillary Electrophoresis with Platinum Nanoparticles Modified Micro-disk Electrode
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Simultaneous Determination of Peroxide Hydrogen and Ascorbic Acid by Capillary Electrophoresis with Platinum Nanoparticles Modified Micro-disk Electrode

机译：用铂纳米颗粒改性微圆盘电极同时测定过氧化物氢和抗坏血酸

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摘要

In this study, the first application of a capillary zone electrophoresis-electrochemical detection (CE-ECD) method for concurrent determination of hydrogen peroxide (H2O2) and ascorbic acid (AA), was developed using the Pt nanoparticles (PtNPs) modified Pt micro-disk electrode (PtME). The electrocatalytic activity of the modified electrode for H2O2 and AA was characterized by cyclic voltammetry. Under optimized experimental conditions, highly linear calibration plots were observed for both H2O2 and AA, with concentration linear ranges of 0.8 mu M to 0.8 mM and 1.0 mu M to 0.8 mM. Detection limits of 0.2 MH2O2 and 0.5 mu M AA were determined on the basis of the signal-to-noise characteristics (S/N=3) of an electropherogram. Compared with the unmodified PtME, the sensitivity was promoted in that PtNPs/PtME provided an increased effective electrode surface and high catalytic activity toward H2O2 and AA. Using this method, the added H2O2 and AA in Mizone, a kind of functional drink, were detected, and the concentration of AA was found to be 2.33 mM (n=3). The recovery rates were 95.3% for H2O2 and 98.7% for AA. The novel approach provided a wide linear range, low detection limit, good reproducibility and stability. It will provide a new insight into the balance of reactive oxygen species and antioxidant in biological systems.
机译：在该研究中，使用PT纳米颗粒（PTNP）改性PT Micro-Micro-Microply开发了用于同时测定过氧化氢（H2O2）和抗坏血酸（AA）的同时测定的毛细管区电泳 - 电化学检测（CE-ECD）方法。磁盘电极（PTME）。用于H 2 O 2和AA的改性电极的电催化活性通过循环伏安来表征。在优化的实验条件下，对于H 2 O 2和AA，观察到高度线性校准图，浓度线性范围为0.8μm至0.8mm，1.0μm至0.8mm。基于电泳图的信号对噪声特性（S / N = 3）确定0.2MH2O2和0.5μMAA的检测限。与未经修改的PTME相比，在PTNPS / PTME中促进了敏感性，提供了增加的有效电极表面和朝H 2 O 2和AA的高催化活性。使用该方法，检测到在Mizone中添加的H 2 O 2和Aa，一种功能饮料，发现AA的浓度为2.33mm（n = 3）。 H2O2的回收率为95.3％，AA的98.7％。该新方法提供了广泛的线性范围，检测极限低，再现性好和稳定性。它将在生物系统中对反应性氧气种类和抗氧化剂的平衡提供新的洞察。

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  • 来源
    《Electroanalysis》 |2017年第11期|共8页
  • 作者

    Wang J.; Zhou M.; Dong R.; Cong X.; Zhang R.; Wang X.;

  • 作者单位

    Shandong Normal Univ Coll Chem Chem Engn &

    Mat Sci Collaborat Innovat Ctr Functionalized Probes Chem Key Lab Mol &

    Nano Probes Minist Edu Inst Mol &

    N Jinan 250014 Shandong Peoples R China;

    Shandong Normal Univ Coll Chem Chem Engn &

    Mat Sci Collaborat Innovat Ctr Functionalized Probes Chem Key Lab Mol &

    Nano Probes Minist Edu Inst Mol &

    N Jinan 250014 Shandong Peoples R China;

    Shandong Normal Univ Coll Chem Chem Engn &

    Mat Sci Collaborat Innovat Ctr Functionalized Probes Chem Key Lab Mol &

    Nano Probes Minist Edu Inst Mol &

    N Jinan 250014 Shandong Peoples R China;

    Shandong Normal Univ Coll Chem Chem Engn &

    Mat Sci Collaborat Innovat Ctr Functionalized Probes Chem Key Lab Mol &

    Nano Probes Minist Edu Inst Mol &

    N Jinan 250014 Shandong Peoples R China;

    Shandong Normal Univ Coll Chem Chem Engn &

    Mat Sci Collaborat Innovat Ctr Functionalized Probes Chem Key Lab Mol &

    Nano Probes Minist Edu Inst Mol &

    N Jinan 250014 Shandong Peoples R China;

    Shandong Normal Univ Coll Chem Chem Engn &

    Mat Sci Collaborat Innovat Ctr Functionalized Probes Chem Key Lab Mol &

    Nano Probes Minist Edu Inst Mol &

    N Jinan 250014 Shandong Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 电化学、电解、磁化学;
  • 关键词

    Ascorbic acid; Capillary electrophoresis; Hydrogen peroxide; Pt nanoparticles; Simultaneous electrochemical detection;

    机译：抗坏血酸;毛细管电泳;过氧化氢;Pt纳米粒子;同时电化学检测;

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