[PDF] Top 20 On the Electrochemical Oxidation of Dopamine, Ascorbic Acid and Uric Acid onto a Bare Carbon Paste Electrode from a 0.1 M NaCl Aqueous Solution at pH 7

... of dopamine concentrations, our research group has developed various investigations [2-11] aiming to study the neurotransmitter both experimentally [2- 4,7-11] and theoretically ...on dopamine has been ... See full document

... for solution containing mixture of both 1X10 -3 M AA and 1X10 -4 M DA and ...-3 M UA in phosphate buffer solution of pH 7.4. The bare CPE (dashed line) showed only one ... See full document

... novel electrochemical sensor has been of considerable interest ...as uric acid (UA) and ascorbic acid ...and pH regulator properties often being added to various food products ... See full document

... modified electrode was prepared by electrochemically pre-treating the bare carbon paste electrode by cycling the potential scan between –400mV to 1400 mV in ...sulphuric acid ... See full document

... multi-walled carbon nanotubes (MWCNTs) or graphene has been investigated for detecting biological samples [43, ...aliquots onto the GCE surfaces. Each newly-prepared modified electrode was ... See full document

... for solution containing mixture of 10 µM DA and 100 µM AA in 0.2 M phosphate buffer solution at pH = ...both bare PGE and SDS/PGE. The bare PGE (solid line) shows only one broad ... See full document

... paper, dopamine(DA) and uric acid(UA) were selectively determined using cyclic voltammetry and differential pulse voltammetry in the presence of ascorbic acid(AA) by a glass ... See full document

... of pH 7 and 9, but poor dispersions in PAA solutions of low pHs (pH 1-5) and high pHs (pH 11 and ...cast from the PAA/CNT dispersions of different pH were consistent with ... See full document

... the bare elec- trode are shown in Figure 3. At the bare electrode when both AA and DA coexist, only one voltammetric peak is obtained for both ...concentrations from the broad voltammetric ... See full document

... modified carbon paste electrode (CPE) and was developed for the simultaneous determination of dopamine, uric acid and folic acid at physiological pH ...and ... See full document

... individual electrochemical behaviors of AA, DA and UA at a NDCS/GCE were first investigated by cyclic voltammetry (CV) as shown in ...The oxidation peak of AA, DA, UA on NDCS@GCE are around ...the ... See full document

... Earlier electrochemical procedures based on the oxidation of UA at carbon-based electrodes in acidic solutions suffered from interference from AA which can be oxidized at a potential ... See full document

... ultrasounds ascorbic acid, such as 34–85 and 570–3400 mol/L, can be found in human plasma and urine, respectively ...[7,9]. Uric acid is the major final product of purine catabolism in the ... See full document

... (Fig. 7). Regardless at a bare CPE or at the poly(PR) coated electrode, only could the oxidation peak be observed in pH ...that electrochemical reaction of UA was an irreversible ... See full document

... for solution containing mixture of 20µΜ DA, 100µΜ AA and 50µM UA in ...of pH 7.4. The bare CPE showed only one broad anodic peak without giving reduction peak (dashed line) for the sample ...the ... See full document

... in dopamine hydrochloride injection [21, ...modified electrode for the determination of DA in real sample [6, 19] such as human urine [9, ...the electrochemical sensor to determine DA in human urine ... See full document

... and electrochemical activity of GNS and AuNPs/GNS were investigated by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and electrochemical ...excellent ... See full document

... sensitive electrochemical method for the determination of dopamine in the presence of LTG and TX-100 surfactant; the oxidation peak current of dopamine remarkably increases at the CPE ... See full document

... the electrochemical detection of DA is serious interferences caused by the ascorbic acid (AA), L-Ascorbic acid (Vitamin C) (AA), a water soluble vitamin, is an extremely important ... See full document

... Dopamine (DA) is one of the most important neurotransmitters and plays a significant role in the functioning of central nervous system. A serious diseases such as Schizophrenia and Parkinsonism may result by loss ... See full document