A novel highly sensitive carbon-based HMPD/GC sensor electrode: copper ions analysis in flour and water samples

Abstract

a b s t r a c tIn this research, (Z)-2-(2-(hydroxyimino)-2-(3-methyl-3-phenylcyclobutyl)ethyl)-3a,7a-dihydro-1H-isoindole-1,3(2H)-dione, HMPD molecule has been grafted to the glassy carbon (GC) electrode surface. The HMPD-modified GC electrode has been originally developed and it used for the quantitative determination of Cu(II) in flour and water samples. The modification steps have been performed using cyclic voltammetry (CV). CV, electrochemical impedance spectroscopy and scanning electron microscopy have been employed for the characterization processes. Cu(II) standard solutions changing from 1.0 × 10 -9 to 1.0 × 10 -3 M have been prepared and the corresponding peak currents have been measured. From the obtained data calibration equation has been calculated I p = -1.555C cu + 15.86 which is having a 0.9974 correlation coefficient. 10.0 mL of flour and water samples have been mixed with 10.0 mL Britton-Robinson (BR) buffer solution (pH = 5.00) and HMPD/GC sensor electrode has been kept in these mixed solutions for 90 min. Differential pulse voltammetric (DPV) technique has been applied for the measurement of the peak currents. After the application of the developed sensor electrode for Cu(II) detection in flour and water samples, Cu(II) ion concentrations have been calculated from the obtained peak current values, 1.97 and 2.46 µA. The Cu(II) ion concentrations have been calculated as 1.17 × 10 -9 and 2.41 × 10 -9 M, respectively.

High sensitivity, fast and low-cost sensor electrode development study for dopamine detection: using MWCNT modified PGE/CTP

“…The chemical sensor electrode obtained by electrochemical methods has been frequently used in the quantitative determination of organic and inorganic species in recent years. Carbon electrodes are generally used because of low cost, speed, low equipment, chemical inertness, low background current, wide potential window and minimum sample pretreatment required prior to analysis in electrochemical techniques [13][14][15]. The purpose of this study was to examine the usability of PGE/CTP/MWCNT sensor electrode in the determination of DA by DPV, SWV and SWAdSV techniques.…”