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首页> 外文期刊>RSC Advances >A screen printed carbon electrode modified with carbon nanotubes and gold nanoparticles as a sensitive electrochemical sensor for determination of thiamphenicol residue in milk
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A screen printed carbon electrode modified with carbon nanotubes and gold nanoparticles as a sensitive electrochemical sensor for determination of thiamphenicol residue in milk

机译：用碳纳米管和金纳米颗粒改性的筛网印刷碳电极作为敏感的电化学传感器，用于测定牛奶中硫代霉素残留物

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摘要

Antibiotic residues in milk are of great concern for health regulatory agencies, milk consumers, and dairy farmers due to their destructive effects, ranging from allergic reactions, antibiotic resistance and the ability to interfere with the production of fermented products (i.e. cheese and yogurt). Therefore, a reliable, fast, and simple method needs to be developed to monitor antibiotic residues in milk samples before distribution to consumers. In this study, the first sensitive electrochemical sensor is presented for the determination of thiamphenicol (TAP), a broad-spectrum antibiotic in bovine milk. In the fabrication process, a screen printed electrode (SPE) was modified with gold nanoparticles (AuNPs) and carbon nanotubes (CNTs) using ethylenediamine (en) as a cross linker. Cyclic voltammetry studies showed an adsorptive control process for the electro-oxidation of TAP at -0.1 V on the modified electrode of SPE/CNT/en/AuNPs. Differential pulse voltammetry (DPV) was applied for the quantitative determination of TAP under optimized conditions (0.1 M citrate buffer, pH 6.0, accumulation potential -0.7 V, and accumulation time 150 s). A DPV study for TAP shows a wide linear calibration range of 0.1-30 mu M with the detection limit of 0.003 mu M. Furthermore, the developed sensor displays high sensitivity, reproducibility, repeatability, and good stability for the detection of TAP. The proposed sensor was successfully applied for the determination of spiked TAP in bovine milk with satisfactory results.
机译：由于其破坏性效应，牛奶中的抗生素残留是卫生监管机构，牛奶消费者和乳制品农民的关注，从过敏反应，抗生素抗性和干扰发酵产物的生产的能力（即奶酪和酸奶）。因此，需要开发可靠，快速，简单的方法以在分配给消费者之前监测牛奶样品中的抗生素残留物。在该研究中，提供了第一敏感电化学传感器用于测定硫胺（Tap），牛奶中的广谱抗生素。在制造过程中，使用乙二胺（EN）作为交叉连接器，用金纳米颗粒（AUNP）和碳纳米管（CNT）改性筛网印刷电极（SPE）。循环伏安法研究表明，在SPE / CNT / EN / AUNP的改性电极上在-0.1V的电氧化氧化的吸附控制过程。施加差分脉冲伏安法（DPV）用于在优化条件下进行定量测定龙头（0.1M柠檬酸盐缓冲液，pH6.0，累积电位-0.7V和累积时间150s）。龙头的DPV研究显示了0.1-30μm的宽线性校准范围，检测限为0.003μm。此外，发达的传感器显示出高灵敏度，再现性，可重复性和良好的稳定性，用于检测水龙头。所提出的传感器成功地应用于测定牛奶中的尖龙，结果令人满意。

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  • 来源
    《RSC Advances》 |2018年第5期|共9页
  • 作者

    Muhammad Aliyu; Hajian Reza; Yusof Nor Azah; Shams Nafiseh; Abdullah Jaafar; Woi Pei Meng; Garmestani Hamid;

  • 作者单位

    Univ Putra Malaysia Fac Sci Dept Chem Serdang 43400 Selangor Malaysia;

    Georgia Inst Technol Sch Mat Sci &

    Engn Atlanta GA 30332 USA;

    Univ Putra Malaysia Fac Sci Dept Chem Serdang 43400 Selangor Malaysia;

    Georgia Inst Technol Sch Mat Sci &

    Engn Atlanta GA 30332 USA;

    Univ Putra Malaysia Fac Sci Dept Chem Serdang 43400 Selangor Malaysia;

    Univ Malaya Fac Sci Dept Chem Kuala Lumpur 50603 Malaysia;

    Georgia Inst Technol Sch Mat Sci &

    Engn Atlanta GA 30332 USA;

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  • 正文语种 eng
  • 中图分类 化学;
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