曲靖师范学院学报 ›› 2020, Vol. 39 ›› Issue (3): 47-51.

• 化学与生物学研究 • 上一篇    下一篇

纳米ZnO修饰电极检测食品中的亚硝酸盐

付明秋浩, 万荣泰, 何章玉, 林忠霞, 杨海征   

  1. 曲靖师范学院 化学与环境科学学院,云南 曲靖 655011
  • 收稿日期:2019-11-25 出版日期:2020-05-26
  • 通讯作者: 杨海征,曲靖师范学院化学与环境科学学院农艺师,主要从事土壤化学与植物营养研究.
  • 作者简介:付明秋浩,曲靖师范学院化学与环境科学学院制药工程专业本科生,主要从事药物分析研究.
  • 基金资助:
    山东省自然科学基金“可视、可控、携载miR-101的纳米复合制剂对非小细胞肺癌靶向治疗研究”(ZR2016HQ10);云南省大学生创新创业训练计划“环境友好型秸秆基复合材料的制备”(201810684027)、“可控缓释抗肿瘤药物 DOX pH 敏感型纳米载体的构建”(201810684039)、“基于柔性纳米复合材料的可穿戴葡萄糖生物传感器研究”(201910684005).

Detecion of nirite by Nano-ZnO modified electrodes

Fu Mingqiuhao, Wan Rongtai, He Zhangyu, Lin Zhongxia, Yang Haizheng   

  1. College of Chemistry and Environmental Science,Qujing Normal University, Qujing Yunnan 655011,China
  • Received:2019-11-25 Published:2020-05-26

摘要: 利用电化学沉积法制得纳米氧化锌薄膜,再用该材料修饰ITO电极,并将该修饰电极应用于亚硝酸盐的检测研究.研究结果表明,在恒定电流9×10-8 A、修饰时沉积时间为25min时,该修饰电极对亚硝酸盐的催化氧化效果最好.其峰电流与亚硝酸盐浓度在3.33×10-8 M至3.33×10-6 M范围内有良好线性关系.检出限低至1.0×10-7 M.利用该电极对0.1 M NaCl和0.01 M NaNO2混合溶液进行了5次平行测定,相对标准偏差(RSD)为±10.2%,该修饰电极灵敏度高,重现性好.

关键词: 修饰电极, ZnO/ITO, 循环伏安法, 亚硝酸盐

Abstract: A simple and sensitive electrochemical analysis method for nirite detection based on electrochemical deposition nano-ZnO film on ITO electrodes was constructed. The ITO electrode modified by nano-ZnO was studied and characterized by electrochemical method. Under the optimum conditions, the differential pulse voltammetry (DPV) responses of ITO electrode modified by nano-ZnO toward NO2- was evaluated in a good linear range from 3.33×10-8 to 3.33×10-6 M, with a detection limit of 1.0×10-7 M at S/N=3. The prepared electrochemical method exhibited advantages of simple preparation, easy surface renewal, better reproducibility and satisfactory stability. This modified electrode can be successfully applied to the determination of NO2- in a real sample without complex pretreatment.

Key words: modified electrode, ZnO/ITO, cyclic voltammetry, nitrite

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