Electrochemical Determination of 17-β-Estradiol Using a Glassy Carbon Electrode Modified with α-FeO Nanoparticles Supported on Carbon Nanotubes.

In this study, a novel electrochemical assay for determining 17-β-estradiol (E2) was proposed. The approach involves modifying a glassy carbon electrode (GCE) with a nanocomposite consisting of α-FeO nanoparticles supported on carbon nanotubes (CNTs)-denoted as α-FeO-CNT/GCE. The synthesis of the α-FeO-CNT nanocomposite was achieved through a simple and cost-effective hydrothermal process.

Electrochemical Sensor Based on Multi-Walled Carbon Nanotubes and N-Doped TiO Nanoparticles for Voltametric Simultaneous Determination of Benserazide and Levodopa.

An electrochemical sensor for simultaneous determination of Benserazide (BEZ) and levodopa (L-dopa) was successfully developed using a glassy carbon electrode (GCE) modified with multi-walled carbon nanotube and nitrogen-doped titanium dioxide nanoparticles (GCE/MWCNT/N-TiO). Cyclic voltammetry and square wave voltammetry were employed to investigate the electrochemical behavior of different working electrodes and analytes. In comparison with unmodified GCE, the modified electrode exhibited better electrocatalytic activity towards BEZ and L-dopa and was efficient in providing a satisfactory separation for oxidation peaks, with a potential difference of 140 mV clearly allows the simultaneous determination of these compounds.