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• W4362471611 endingPage "104874" @default.
• W4362471611 startingPage "104874" @default.
• W4362471611 abstract "This research not only assesses the phthalate molecular blocking effect on differential pulse voltammetric nanosensor, but also qualifies phthalate blockers at too low concentrations. To achieve these goals, the copper surface is modified by a two-ingredient paste containing electroencephalographic gel (EEG) and multi-walled carbon nanotubes (MWCNTs). The Fe2+/Fe3+ couple was chosen as a voltammetric signal generator. Di-buthyl phthalate (DBP), di-methyl phthalate (DMP), diethyl hexyl phthalate (DEHP) and dicyclo hexyl (DCHP) phthalate were assessed to block the surface of fabricated nanosensor. The Box-Behnken design (BBD) was used to optimize the experimental major parameters; Fe2+ and supporting electrolyte (KCl) concentrations, pH and MWCNTs/EEG ratio. The phthalate molecular blocker cuts the Fe2+ oxidation signal because of holding Fe2+ ions back from the surface of the nanosensor. The optimum conditions were obtained as CFe2+= 402 µM, CKCl = 0.13 M, pH = 8.2 and MWCNTs/EEG ratio = 0.09. The field emission scanning electron microscopy (FESEM), X-Ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Brunauer–Emmett–Teller (BET) porosity analysis, differential pulse voltammetry (DPV) and electrochemical impedance spectroscopy (EIS) were employed for evidence giving and gathering. The obtained results confirmed the molecular blocking effect of phthalates; and an accepted linear relationship between signal cutback and blocker concentration was observed. The limit of detection (LOD) and limit of quantitation (LOQ) were equal to 0.004–0.009 µgL−1 and 0.01–0.03 µgL−1, respectively. Finally, the fabricated nanosensor was successfully utilized in aqueous real sample analyses, and satisfactory results were obtained." @default.
• W4362471611 created "2023-04-05" @default.
• W4362471611 creator A5009287343 @default.
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• W4362471611 date "2023-08-01" @default.
• W4362471611 modified "2023-09-27" @default.
• W4362471611 title "Differential pulse voltammetric assessment of phthalate molecular blocking effect on the copper electrode modified by multi-walled carbon nanotubes: Statistical optimization by Box-Behnken experimental design" @default.
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• W4362471611 doi "https://doi.org/10.1016/j.arabjc.2023.104874" @default.
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