• EI
  • Scopus
  • 食品科学与工程领域高质量科技期刊分级目录第一方阵T1
  • DOAJ
  • EBSCO
  • 北大核心期刊
  • 中国核心学术期刊RCCSE
  • JST China
  • FSTA
  • 中国精品科技期刊
  • 中国农业核心期刊
  • CA
  • WJCI
  • 中国科技核心期刊CSTPCD
  • 中国生物医学SinoMed
中国精品科技期刊2020
司晓晶,韩婧婷,朱文菁,等. 石墨烯/四氧化三钴电化学传感器的建立及饼干中香兰素检测分析[J]. 食品工业科技,2021,42(8):221−226. doi: 10.13386/j.issn1002-0306.2020040287.
引用本文: 司晓晶,韩婧婷,朱文菁,等. 石墨烯/四氧化三钴电化学传感器的建立及饼干中香兰素检测分析[J]. 食品工业科技,2021,42(8):221−226. doi: 10.13386/j.issn1002-0306.2020040287.
SI Xiaojing, HAN Jingting, ZHU Wenjing, et al. Establishment of Graphene/Cobaltosic Oxide Electrochemical Sensor and the Detection and Analysis of Vanillin in Cookies[J]. Science and Technology of Food Industry, 2021, 42(8): 221−226. (in Chinese with English abstract). doi: 10.13386/j.issn1002-0306.2020040287.
Citation: SI Xiaojing, HAN Jingting, ZHU Wenjing, et al. Establishment of Graphene/Cobaltosic Oxide Electrochemical Sensor and the Detection and Analysis of Vanillin in Cookies[J]. Science and Technology of Food Industry, 2021, 42(8): 221−226. (in Chinese with English abstract). doi: 10.13386/j.issn1002-0306.2020040287.

石墨烯/四氧化三钴电化学传感器的建立及饼干中香兰素检测分析

Establishment of Graphene/Cobaltosic Oxide Electrochemical Sensor and the Detection and Analysis of Vanillin in Cookies

  • 摘要: 本文将石墨烯(GR)滴涂在玻碳电极(GCE)后,再通过循环伏安法电聚合氧化Co(COOH)2制得Co3O4/GR/GCE修饰电极作为食品中检测香兰素的新型电化学传感器。通过扫描电镜技术对Co3O4/GR复合纳米材料进行了表征并优化了实验条件。结果表明,当1 mg/mL GR滴涂量为8 μL,Co(COOH)2聚合圈数为20圈,0.1 mol/L pH 4.5磷酸缓冲溶液中,香兰素在该传感器下线性关系良好(0.1~80 μmol/L),线性方程为:Ip (μmol/L)=0.1518C+0.5103 (R2=0.997),检测限为0.033 μmol/L (S/N=3)。将此方法应用于饼干样品中香兰素检测,回收率良好,相对标准偏差仅1.47%。综上,该电化学传感器灵敏度较高、稳定性良好,在实际样品检测中具有可行性,拥有广阔的应用前景。

     

    Abstract: The Co3O4/GR/GCE modified electrode, which as a novel electrochemical sensor for determination of vanillin in food, was prepared by dropping graphene (GR) onto a glassy carbon electrode(GCE) and then electro-polymerized by Co(COOH)2 by cyclic voltammetry in this work. The Co3O4/GR composite nanomaterials were characterized by scanning electron microscopy. Moreover, the experimental conditions were optimized. Results showed that, 8.0 μL GR solution (1 mg/mL) of coating amount, 20 electro-polymerization cycles of Co(COOH)2 and pH=5 of 0.1 mol/L phosphate buffer solution were chosen as the best experimental condition. Therefore, vanillin had a good linear relationship in the concentration range of 0.1~80 μmol/L with the electrochemical sensor, and the linear equation was: Ip (μmol/L)=0.1518C+0.5103 (R2=0.997) with detection limit was 0.033 μmol/L (S/N=3). The method was applied to the determination of vanillin in biscuit samples with good recovery and RSD of 1.47%. The results indicated that the electrochemical sensor had high sensitivity and fabulous stability, which proved the feasibility of the electrochemical sensor in practical sample detection and had a wide application prospect.

     

/

返回文章
返回