期刊
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 65, 期 4, 页码 727-736出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.6b04675
关键词
carbendazim; thiabendazole; ZnFe2O4/SWCNTs; simultaneous determination
资金
- National Nature Science Foundation of China (NSFC) [51672116]
- Science and Technology Foundation of Ocean and Fisheries of Liaoning Province [201408, 201406]
- General project of scientific research of the Education Department of Liaoning Province [L2015206]
- Liaoning scientific instruments service sharing information platform ability construction funds [201507A003]
- Foundation of 211 project for Innovative Talent Tratining, Liaoning University
In this work, a novel ZnFe2O4/SWCNTs nanohybrid was successfully synthesized as electrode material and applied to the simultaneous quantitative determination of carbendazim (CBZ) and thiabendazole (TBZ). The electrochemical behaviors of CBZ and TBZ on the ZnFe2O4/SWCNTs/GCE were investigated using cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The electrochemical active area of modified electrode was calculated, which is nearly 5.5 times that of the bare electrode. The influence of various factors such as accumulation time, pH and scan rates, type of surfactant, and the electrochemical reaction mechanism was studied. The results showed that the reaction of CBZ/TBZ was controlled by adsorption/diffusion and was a quasi-reversible/an irreversible process at the ZnFe2O4/SWCNTs/GCE. In the pH 7.0 phosphate-buffered saline (PBS) containing 10.0 mu g/mL CTAB, the electrochemical responses of CBZ and TBZ were separately investigated and were linearly dependent on their concentrations ranging from 0.5 to 100.0 mu M, with relatively low detection limits of 0.09 and 0.05,mu M, respectively. The concentration range for the simultaneous determination of CBZ and TBZ was 1.0-100.0 mu M. Furthermore, with satisfactory results, the proposed electrochemical sensor was successfully applied to the determination of CBZ and TBZ in the real samples.
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