title: One-Step Fabrication of a Multifunctional Magnetic Nickel Ferrite/Multi-walled Carbon Nanotubes Nanohybrid-Modified Electrode for the Determination of Benomyl in Food.
abstract: 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 × 10(-7) to 5.00 × 10(-7) mol/L and from 5.00 × 10(-7) to 1.00 × 10(-5) mol/L, respectively. The detection limit was 2.51 × 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.
authors.affiliation: College of Chemistry, Liaoning University, 66 Chongshan Middle Road, Shenyang, Liaoning 110036, People's Republic of China.
authors.forename: Qiong
authors.initials: Q
authors.lastname: Wang
authors.affiliation: College of Chemistry, Liaoning University, 66 Chongshan Middle Road, Shenyang, Liaoning 110036, People's Republic of China.
authors.forename: Jichun
authors.initials: J
authors.lastname: Yang
authors.affiliation: College of Chemistry, Liaoning University, 66 Chongshan Middle Road, Shenyang, Liaoning 110036, People's Republic of China.
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Dong
authors.affiliation: College of Chemistry, Liaoning University, 66 Chongshan Middle Road, Shenyang, Liaoning 110036, People's Republic of China.
authors.forename: Lei
authors.initials: L
authors.lastname: Zhang
mesh_terms: D000363:Agaricales / Q000737:chemistry*; D001542:Benomyl / Q000032:analysis*; D015374:Biosensing Techniques / Q000295:instrumentation / Q000379:methods*; D004566:Electrodes; D005290:Ferric Compounds / Q000737:chemistry; D005506:Food Contamination / Q000032:analysis*; D060328:Magnetic Phenomena; D027845:Malus / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry; D009532:Nickel / Q000737:chemistry; D010575:Pesticides / Q000032:analysis*; D018724:Spinacia oleracea / Q000737:chemistry*
chemical_list: D005290:Ferric Compounds; D037742:Nanotubes, Carbon; D010575:Pesticides; C550717:nickel ferrite; D009532:Nickel; D001542:Benomyl
keywords: NiFe2O4 nanoparticles; benomyl; cyclic voltammetry; multi-walled carbon nanotubes