This paper describes the development, electrochemical characterization and utilization of novel modified molybdenum (VI) complex-carbon nanotube paste electrode for the electrocatalytic determination of ascorbic acid (AA). The electrochemical profile of the proposed modified electrode was analyzed by cyclic voltammetry (CV) that showed a shift of the oxidation peak potential of AA about 235 mV ...

the electrocatalytic oxidation of captopril (cap) was studied by modified carbon nanotubes paste electrode in the presence of isoproterenol (ispt) using cyclic voltammetry (cv), chronoamperometry and square wave voltammetry (swv). also, the values of catalytic rate constant (k), and electron transfer coefficient (α) for cap were calculated. the mechanism of ca electrochemical behavior at the mo...

developing simple, sensitive and selective sensing systems for dopamine is important due to its biological significance. in this work, a silver nanoparticles-modified carbon paste electrode (agnps-cpe) has been constructed and used to detect of dopamine (da) in the simultaneous presence of ascorbic acid (aa) and uric acid (ua) at neutral ph 7.0 by cyclic voltammetry. the modified electrode show...

In this work a new chemically modified carbon paste electrode was constructed for accurate, simple, sensitive and selective determination of molybdenum (VI) ions. The results of modified electrode by an ion imprinted polymer were compared with those obtained with carbon paste electrode. The results showed the stripping peak currents had a dramatic increase at the modified electrode. Under the o...

In this work, for the first time poly (benzoquinone) chromium (III) complex (PBQC) was synthesized with a one pot, one step, simple and fast method. This novel polymer was used for modification of graphite paste electrode for electrochemical determination of Mesalazine. Moreover, this novel modifier was characterized by Fourier transform infrared spectroscopy, Field emission scanning electron m...

a flow injection method is reported for the determination of ascorbic acid based on amperometric detection, using a cobalt(ii) phthalocyanine (copc) modified graphite-epoxy electrode. the amperometric respons was evaluated with regard to ph, ionic strength of the electrolyte, flow rate of the carrier solution, injected sample volume and conditioning time of the electrode. the limit of detection...

In this work, sol-gel method was used tosynthesize titanium dioxide nanoparticles (TiO2). The TiO2nanoparticles was characterized by Scanning Electron Microscopy (SEM), x-ray diffraction (XRD) and BET technique.The TiO2 and coumarin derivative (7-(1,3-dithiolan-2-yl)-9, 10-dihydroxy-6H-benzofuro [3,2-c] chromen-6-on) were incorporated in a graphite composite ele...

in this paper, a nanostructured modified electrode was fabricated by incorporating of 2,2′-[1,9-nonanediylbis(nitriloethylidyne)]-bis-hydroquinone (nnh) as a newly synthesized modifier and tio2 nanoparticles to the carbon paste (mtcpe) and then was used for the electroanalysis of epinephrine (ep). the electrochemical studies were carried out by using cyclic voltammetry, chronoamperometry and di...

in this work, the results concerning to the mean activity coefficient measurements for nacl in the (glycerol + water) system using the potentiometric method are reported. the potentiometric measurements were performed on the galvanic cells without liquid junction of the type: ag|agcl|nacl (m), glycerol (wt%), h2o (1 - wt)%|na-ise, in various mixed solvent systems containing 0, 5, 10, 20 and 30 ...