Rapid and Sensitive Determination of Dinotefuran Residue Based on Electrochemical Enhancement of β‐cyclodextrin‐Graphene Composite

Abstract

A rapid method for sensitive voltammetric determination of dinotefuran residue was reported. The proposed method was based on the electrocatalytic reduction of dinotefuran on β‐cyclodextrin‐graphene composite modified glassy carbon electrode (β‐CD‐rGO/GCE), giving rise to a higher reduction signal to dinotefuran relative to the bare (GCE) and graphene modified electrode (rGO/GCE). Moreover, a further signal enhancement was observed when the modified electrode incubated in solution at low temperature (0 °C) for a short time. The reduction mechanism and binding affinity were also discussed. The external standard calibration curve was obtained from linear sweep voltammetry in the range of 0.5 to 16.0 μM with a detection limit of 0.10 μM. In addition to optimization of pretreatment, this electrochemical method has been applied to the dinotefuran residue determination in millet samples with the detection limit of 0.01 mg kg−1 and compared with an high performance liquid chromatography method. The proposed electrode and analysis methods were proven to be sensitive, accurate and rapid under the used conditions.

Magnetic β-Cyclodextrin Nanosponges for Potential Application in the Removal of the Neonicotinoid Dinotefuran from Wastewater

“…Loading capacities were as follows: NS/Fe3O4 > NSs. The results also show that magnetic NSs show improved sorption capacity after being decorated with magnetic nanoparticles and their sorption efficiency is similar to those of nanomaterials such as functionalized graphene composites (r-GO) [37]. UV-VIS analysis was carried out in order to determine the sorption efficiency of NS.…”

A Dimode Scattering Method for Ultratrace Dinitrofuran Detection with Nanopalladium Molecularly Imprinted Polymer Nanocatalytic Probe

“…To the best of our knowledge, there are no reports in the literature on the determination of DNF by NMIP, MIP, or SERS methods. This method has higher sensitivity and better selectivity than the reported DNF assays ,− (Table S3). The limit of determination (LOD) of this method was defined as follows: , where , S d is the standard deviation of 11 SERS/RRS determinations of the blank sample (MIP-HAuCl 4 -AA-HCl), and N is the slope of the working curve of the DNF-MIP-HAuCl 4 -AA-HCl system (Figure ).…”

Determination of neonicotinoid pesticides nitenpyram and dinotefuran by electroanalytical methods

“…: reference; Pot. : potentiometry; N/Cu-HPC/GCE: three-dimensional nitrogen-doped macro-meso-microporous carbon composites derived from polyvinylpyrrolidone doped Cu-metal organic framework modified glassy carbon electrode; N/NiCu@C/ GCE: NiCu nanoalloy embedded in N-doped porous carbon composite modified glassy carbon electrode DNF was electrochemically analyzed in the direction of reduction in B-R buffer solution at pH 6.5 using a silver amalgam film electrode [Hg(Ag)FE] by Smarzewska et al [72]. Scan rate study showed that DNF had an irreversible and diffusion-controlled process on Hg(Ag)F. Quantitative determination of DNF was carried out by a calibration study by SWV with a sensitivity of 0.23 A (mol/L) -1 .…”