We report a new, sensitive stripping voltammetric method for the detection of As(III) in aqueous solution using either gold macroelectrode or nanoparticle-modified glassy carbon electrode (GCE) based on underpotential deposition (UPD) As ad-atoms. The pre-concentration step deposits and accumulates ad-atoms onto is followed by potential sweep to strip with no interference from Cu(II) Cl- at ele...

A Mn(II) complex, MnL (L=sodium (E)-3-((1-carboxyethylimino)methyl)-4-hydroxybenzenesulfonate), was synthesized and characterized using elemental analysis and IR spectroscopy. Cyclic voltammetry (CV) and fluorescence spectroscopy were used to investigate the interaction between MnL and salmon sperm DNA. It was revealed that MnL presented high electrochemical activity on glassy carbon electrode ...

A highly sensitive method for bezafibrate determination using a glassy carbon electrode (GCE) modified with multi-walled carbon nanotubes within a dihexadecyl hydrogen phosphate film based on square-wave adsorptive stripping voltammetry (SWAdSV) is proposed. The electrochemical behaviour of bezafibrate has been studied by cyclic voltammetry, showing an irreversible anodic peak at a potential of...

In this work, we fabricated an electrochemical sensor based on trimethyloctadecylammonium bromide and multi-walled carbon nanotubes-Fe3O4 hybrid (TOAB/MWCNTs-Fe3O4) for sensitive detection of tetrabromobisphenol A (TBBPA). The nanocomposite was characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and Fourier transform infrared spectroscopy (FT-IR) techniques. The ele...

lism. Severe changes in the concentration of uric acid causes several diseases such as gout, hyperuricemia and Lesch–Nyhan syndrome. Therefore, the accurate determination of uric acid in urine samples can be a powerful indicator of diagnosing diseases. Thus, many researchers have focused to develop a simple, sensitive and accurate method for determining uric acid. Various methods have been deve...

Zinc oxide nanoparticles (ZnONPs), multiwalled carbon nanotubes (MWCNTs) and 1,4benzoquinone (BQ) dispersed in chitosan (CS) matrix were used to construct a xanthine biosensor. Xanthine oxidase (XOx) was immobilized onto BQ-MWCNTs-ZnO–CS composite modified glassy carbon electrode (GCE) using glutaraldehyde as the crosslinking agent. The parameters of the construction process and the experimenta...

Condensed tannins are short polymers of flavan-3-ols found in grapes (also known as proanthocyanidins). An investigation on the electrochemical oxidation grapevine proanthocyanidins (PAs) glassy carbon electrodes under various conditions was conducted for first time. To study how were oxidized, square-wave and cyclic voltammetry used. There is a predominant peak associated with extract proantho...

In the past few years, design and fabrication of highly sensitive selective electrochemical sensors have received enormous attention from electrochemists. Acetaminophen is an important drug that used as antipyretic analgesic throughout world. It to monitor accurate amount acetaminophen. Herein, we prepared sulfur-doped reduced graphene oxide (S@rGO) using simple strategies. The morphological fe...

Herein, a sensor platform, Bi/carboxyphenyl-modified glassy carbon electrode (Bi/CP/GCE), is presented for the detection of Cd2+ and Pb2+ using square wave anodic stripping voltammetry (SWASV). The was obtained through electrografting GCE 4-carboxybenzene diazonium tetrafluoroborate (4-CBD) in situ electrodeposition Bi3+. stability grafted layer proposed mechanism interaction between metal ions...

Abstract Adsorptive Stripping Voltammetric method for Nimesulide (NIM) determination was developed. As a working electrode, glassy carbon electrode (GCE) modified with black and Nafion (CB-Nafion GCE) used. All measurements were carried out in 0.1 M acetate buffer (pH 4.6). Conducted experiments allowed to optimize differential pulse voltammetry (DPV) instrumental parameters: sampling waiting t...