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

• Safety Detection • Previous Articles     Next Articles

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

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

CLC Number: