食品科学 ›› 2021, Vol. 42 ›› Issue (14): 328-332.doi: 10.7506/spkx1002-6630-20200502-009

• 安全检测 • 上一篇    下一篇

甲烷氧化菌素-纳米金修饰金电极溶出伏安法对Cu2+的检测

薛也,王艳,赵宁,窦博鑫,辛嘉英,韩烨   

  1. (1.哈尔滨商业大学食品工程学院,黑龙江省普通高校食品科学与工程重点实验室,黑龙江 哈尔滨 150076;2.中国科学院兰州化学物理研究所,羰基合成与选择氧化国家重点实验室,甘肃 兰州 730000)
  • 发布日期:2021-07-27
  • 基金资助:
    黑龙江省财政厅、中央支持地方高校改革发展资金人才培养支持计划项目(304017); 黑龙江省教育厅校级青年创新人才项目青年后备人才专项(2019CX33); 黑龙江省普通高等学校青年创新人才培养计划项目(UNPYSCT-2017198); 哈尔滨商业大学青年创新人才支持项目(2016QN070); 2019年哈尔滨商业大学研究生创新科研项目(YJSCX2019-618HSD)

Determination of Cu2+ by Stripping Voltammetry with Electrodes Modified with Methanobactin-Functionalized Gold Nanoparticles

XUE Ye, WANG Yan, ZHAO Ning, DOU Boxin, XIN Jiaying, HAN Ye   

  1. (1. Key Laboratory of Food Science and Engineering of Heilongjiang Province, College of Food Engineering, Harbin University of Commerce, Harbin 150076, China; 2. State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China)
  • Published:2021-07-27

摘要: 利用甲烷氧化菌素能捕捉环境中Cu2+的特性,以及纳米金放大电信号的作用,制备甲烷氧化菌素功能化纳米金,通过将其修饰金电极的溶出伏安法对Cu2+进行特异性检测。在优化条件下,峰电流与Cu2+浓度的对数在10 nmol/L~100 μmol/L范围内线性关系良好,相关系数为0.960 09,检出限为1.15 nmol/L(信噪比3)。结果证明,本研究所建立的电化学新方法具有较高的检测灵敏度和稳定性,可以为未来食品中Cu2+的检测提供一定理论依据。

关键词: 甲烷氧化菌素;纳米金;溶出伏安法;铜离子

Abstract: Methanobactin-functionalized gold nanoparticles (Mb-AuNPs) were prepared based on the ability of Mb to capture copper ions in the environment and the signal amplifying function of AuNPs. Stripping voltammetry with an Mb-AuNPs-modified electrode could specifically detect Cu2+. Under the optimal conditions, the peak current response showed a good linear relationship with logarithmic copper ion concentration in the range of 10 nmol/L–100 μmol/L with a correlation coefficient of 0.960 09 and the detection limit was 1.15 nmol/L at a signal-to-noise ratio of 3. Accordingly, the new electrochemical method established in this study had high sensitivity and stability, which will provide theoretical basis for the detection of copper irons in foods in the future.

Key words: methanobactin; gold nanoparticles; stripping voltammetry; copper ions

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