[PDF] Top 20 Selective Determination of Dopamine, Ascorbic Acid and Uric Acid at SDS-MWCNTs Modified Glassy Carbon Electrode

... walled carbon nanotubes and SDS modified electrode under comparable conditions, achieved effective separation of the oxidation peaks of dopamine, ascorbic acid and ... See full document

... graphene-modified electrode for selective detection of uric acid was ...bare electrode, the graphene-modified electrode exhibited excellent electro-catalytic ... 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

... 3-thiophenemalonic acid (3-TPA) was prepared on the surface of glassy carbon electrode (GCE) in neutral solution by cyclic voltammetry ...of dopamine (DA) and uric acid ... See full document

... L(+)-ascorbic acid (AA, vitamin C) is the main antioxidant found in both animals and ...28]. Uric acid (UA) and other oxypurines are the main final products of purine metabolism in the human ... 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

... their selective determination in a ternary mixtures is of great importance in electrochemical ...unmodified electrode and (b) 5% L-cysteine Sonogel-Carbon modified electrode in ... See full document

... (PR) modified CPE also possessed strongly electrocatalytic action for UA ...coated electrode, only could the oxidation peak be observed in pH ...poly(PR) modified CPE, the anodic peak potential ... See full document

... of uric acid levels in blood, known as Lesch-Nyhan syndrome or hyperuricemia, is linked with diseases, such as high cholesterol, gout, kidney stones, type 2 diabetes, high blood pressure, cardiovascular ... See full document

... the ascorbic acid (AA), which coexists in biological fluids at high concentrations ...the electrode surface to enhance the detection efficiency of the ...useful electrode surface modifiers for ... See full document

... The determination of dopamine (DA), uric acid (UA) and ascorbic acid (AA) has been studied at MSNMCPE by cyclic voltammetric ...of electrode reaction was diffusion ...the ... See full document

... the modified electrode in mixture of EP, DA, AA and ...the modified electrode exhibited high current signals and well-defined three oxidation peaks for AA, DA/EP and UA at 50, 230 and 380 mV, ... See full document

... graphene modified glassy carbon (mp-GR) electrode by a hydrothermal ...(GONRs) modified with core-shell MWCNT taking advantages of the electrochemical analysis of AA, DA and ...film ... See full document

... MMCPE/immobilized SDS modified electrode in ...the determination of low concentration of ...MMCPE/immobilized SDS modified electrode showed its good selectivity and ... See full document

... aspartic acid film on ...aspartic acid is in agreement with the literature ...form carbon-nitrogen links at the carbon electrode sur- ... See full document

... the electrode surface due to their interaction with iron ...FeNAZ-MWCNT-CH electrode have occurred at different potential windows, which means that the electrochemistry of these four compounds can be well ... See full document

... poly(CA)-modified electrode, which can be prepared by electropolymerization of CA, possesses an excellent electrocatalytic activity for APAP oxidation in neutral aqueous ...the determination of trace ... See full document

... catabolism and it widely exists in biological fluids, such as blood, urine and serum [3, 4]. Abnormal levels of UA may lead to several diseases like gout, Lesh-Nyhan syndrome, renal failure, hyperuricaemia, and ... See full document

... three electrode electrochemical cell. The electrode system contained a carbon paste as working electrode ...counter electrode and saturated calomel electrode as reference ... See full document

... Ten tablets of vitamin C (labeled 500 mg vitamin C per tablet, 10 tablets) were completely ground and homogenized, 140 mg of which was accurately weighed and dissolved with ultrasonication in 25 mL of water. Then, 100 µ ... See full document