Journal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 63, Issue 19, Pages 4746-4753Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.5b00973
Keywords
benomyl; NiFe2O4 nanoparticles; multi-walled carbon nanotubes; cyclic voltammetry
Funding
- National Natural Science Foundation of China (NSFC) [51178212]
- Science and Technology Foundation of Ocean and Fisheries of Liaoning Province [201408, 201406]
- Foundation of 211 Project for Innovative Talent Training, Liaoning University
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Benomyl, as one kind of agricultural pesticide, has adverse impact on human health and the environment. It is urgent to develop effective and rapid methods for quantitative determination of benomyl. A simple and sensitive electroanalytical method for determination of benomyl using a magnetic nickel ferrite (NiFe2O4)/multi-walled carbon nanotubes (MWCNTs) nanohybrid-modified glassy carbon electrode (GCE) was presented. The electrocatalytic properties and electroanalysis of benomyl on the modified electrode were investigated by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). In the phosphate-buffered saline (PBS) of pH 6.0, this constructed biosensor exhibited two linear relationships with the benomyl concentration range from 1.00 x 10(-7) to 5.00 x 10(-7) mol/L and from 5.00 x 10(-7) to 1.00 x 10(-5) mol/L, respectively. The detection limit was 2.51 x 10(-8) mol/L (S/N = 3). Moreover, the proposed method was successfully applied to determine benomyl in real samples with satisfactory results. The NiFe2O4/MWCNTs/GCE showed good reproducibility and stability, excellent catalytic activity, and anti-interference.
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