[PDF] Top 20 Poly (Alanine) Modified Carbon Paste Electrode for Simultaneous Detection of Dopamine and Ascorbic Acid

... Polymer modified electrodes (PMEs) have received great attention in recent years, as the polymer film have good stability, reproducibility, more active sites, homogeneity in electrochemical deposition and strong ... See full document

... at carbon-based electrodes in acidic solutions suffered from interference from AA which can be oxidized at a potential close to that of ...chemically modified electrodes [18-24] were developed to solve the ... See full document

... Therefore, simultaneous measurement of the two analytes is ...the electrode fabrication is very easy and low cost, the present modified electrode seems to be great utility for making ... See full document

... AA, 10 μM DA, and 20 μM UA at bare GCE and PARGCE in pH 6.47 PBS are shown in Fig.3(B). Similarly, the indistinguishable peak potentials of AA, DA, and UA did not appear when DA was oxidized on the modified GCE. ... See full document

... L(+)-ascorbic acid (AA, vitamin C) is the main antioxidant found in both animals and ...Uric acid (UA) and other oxypurines are the main final products of purine metabolism in the human body ...The ... See full document

... the simultaneous determination of dopamine in presence of ascorbic acid at electropolymer modified carbon paste electrode ...used poly (neutral red) ... See full document

... the electrode surface, which results in rather poor selectivity and sensitivity in addition, oxidation of DA at the electrode surface in the presence of AA results in a homogeneous catalytic oxidation of ... See full document

... the simultaneous detection of dopamine (DA) and uric acid (UA) in the presence of ascorbic acid (AA) was developed, based on the poly(thionine) (PTH) modified ... See full document

... 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 substance ... See full document

... The Fig. 4b shows the voltammogram for solution containing mixture of 20µΜ DA, 100µΜ AA and 50µM UA in 0.2M phosphate buffer system of pH 7.4. The bare CPE showed only one broad anodic peak without giving reduction peak ... See full document

... the carbon nanotube (CNT) paste electrode results in the formation of poly (Basic Blue B) film/modified CNT paste electrode ...The Modified electrode was ... See full document

... 3-thiophenemalonic acid (3-TPA) was prepared on the surface of glassy carbon electrode (GCE) in neutral solution by cyclic voltammetry ...The poly(3-TPA) film-coated GCE exhibited excellent ... See full document

... of ascorbic acid (AA), uric acid (UA) and folic acid (FA) and reduced the overpotential for AA oxidation to about 380 mV lower than that of the bare ...The modified carbon ... See full document

... nitric acid was an oxidizer and mixed in an appropriate ratio to form a tin nitrate solution, to this solution ...citric acid which acts as fuel and ... See full document

... voltammetric detection of DA in real samples is the coexistence of interfering compounds such as ascorbic acid ...bare carbon paste electrode ...a modified carbon ... See full document

... in simultaneous determination is the resolu- tion between DA and AA as well as DA and ...for simultaneous determination of DA, AA and UA, such as silver doped poly(L-valine) modified GCE [7], ... See full document

... limit detection, less response time, efficiency, linear range and selectivity ...biosensor modified with several metal nanomaterial’s and QDs have been ...The modified TGA capped CdTe QDs based on ... See full document

... three electrode cell was employed throughout the experiments, with bare or poly (EBT) modified carbon paste electrode ...working electrode, a saturated calomel ... See full document

... of dopamine (DA) and ascorbic acid (AA) by square wave voltammetry has been per- formed at a modified carbon paste electrode with macrocyclic ligand ... See full document

... polymer-coated electrode to determine DA in the presence of AA and UA displayed excellent selectivity and ...a poly(phenosafranine) film modified glassy carbon electrode exhibited ... See full document