Determination of Carbendazim by Adsorptive Stripping Differential Pulse Voltammetry Employing Glassy Carbon Paste Electrode Modified with Graphene and Amberlite XAD 2 Resin

Abstract

Graphene nanosheets (GNS) and amberlite XAD‐2 (XAD2) modified glassy carbon paste electrode (GNS‐XAD2‐GCPE) were fabricated for voltammetric determination of Carbendazim (MBC). GNS was synthesized by Hummer’s method and characterized by SEM, EDAX, and XRD techniques. After optimizing the analytical conditions in 0.4 M citrate buffer (pH 4.0), the peak current was found to be linear in the range of 8.36×10−9 to 4.13×10−6 M (r=0.9986) with detection limit of 3.14×10−9 M (S/N=3) by AdSDPV. The method was validated for the determination of MBC in soil, fruit, blood serum, urine, waste and ground water samples with satisfactory recoveries.

Preparation of Functionalized Ayous Sawdust‐carbon Nanotubes Composite for the Electrochemical Determination of Carbendazim Pesticide

“…Peak currents and peak potentials were found to vary with pH (Figure 8A). As expected from previous works [44,47,76,79], the peak potentials decreased linearly as the pH increased (R 2 > The obtained slope of À 64 mV/pH suggests an equal number of electrons and protons involved in the electrochemical reaction [44,45,[80][81][82]. At alkaline pH values, the observed low currents resulted from the hydrolysis of Cbz.…”

“…By contrast, electrochemical methods offer certain advantages such as low cost of instrumentation, fast analysis and high sensitivity [42,43]. Recently, electrochemical methods based on various electrode modifiers have been reported for the electrochemical determination of carbendazim in various matrices [44][45][46][47][48][49][50][51][52][53][54][55][56][57]. To the best of our knowledge, sawdust-CNTs composite material is not yet reported as electrode modifier for Cbz determination.…”

Semiconductor Nanocrystals-Reduced Graphene Composites for the Electrochemical Detection of Carbendazim

“…The use of electroanalytical methodologies has been an alternative in the detection of pesticides, since they are cheaper techniques with easier sample preparation and rapid analysis time, in addition to high sensitivity and selectivity. [17][18][19][20][21] In this work, we described the preparation of reduced graphene/ZnCdTe semiconductor nanocrystal composites by growing the inorganic nanocrystals in situ onto the graphene sheets, and as well as a study of electrochemical determination of carbendazim pesticide in orange juice fruit by carbon paste electrodes modified with the reduced graphene/ZnCdTe composites.…”

A novel carbon paste electrode based on nitrogen-doped hydrothermal carbon for electrochemical determination of carbendazim

“…19 On the other hand, the electrochemical methods represent an alternative to these techniques and offer adventages, such as good selectivity, easier sample preparation, faster analysis and sensitivity which could be comparable to chromatography. 20 Several papers were published about voltammetric determination of carbendazim using different unmodified 21,22 and modified [23][24][25][26][27][28] carbon-based electrodes, including also carbon paste-based electrodes. 22,23,26 Carbon paste electrode (CPE) is generally a mixture of graphite (carbon) powder and liquid binder (e.g., silicone oil (SO), paraffin oil (PO), tricresyl phosphate (TCP)) packed into adequate electrode body.…”

“…20 Several papers were published about voltammetric determination of carbendazim using different unmodified 21,22 and modified [23][24][25][26][27][28] carbon-based electrodes, including also carbon paste-based electrodes. 22,23,26 Carbon paste electrode (CPE) is generally a mixture of graphite (carbon) powder and liquid binder (e.g., silicone oil (SO), paraffin oil (PO), tricresyl phosphate (TCP)) packed into adequate electrode body. CPEs represent a very popular type of sensors which offers simple laboratory preparation, low price, broad potential window, low background current, unique surface characteristics, usually low toxicity, high sensitivity, and applicability for the monitoring of electrochemically active inorganic and organic environmental pollutants.…”