[PDF] Top 20 Graphene-Modified Electrode for the Selective Determination of Uric Acid Under Coexistence of Dopamine and Ascorbic Acid

... highly selective graphene-modified glassy carbon electrode (GME) is ...investigated. Selective determination of UA by this sensor in the presence of high concentrations of DA and ... See full document

... Compared with the bare GCE, the peak currents of DA, UA and AA increased significantly at the modified electrode. Figure 2(B) show the peak potential of AA shifts to a more negative oxidation side and the ... See full document

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

... a graphene/Pt-modified glassy carbon electrode to simultaneously characterize AA, dopamine (DA), and UA ...the graphene surface. In our previous work[23], for the purpose of selective ... See full document

... the determination of DA has been carried out ...the coexistence of ascorbic acid (AA) and uric acid ...(UA). Uric acid is an end product from purine derivatives in ... 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

... 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 serum ... See full document

... compound. The electrochemical oxidation of DA has been studied to show that it is a two-electron irreversible process with transfer of two protons. Uric acid is the primary end product of purine metabolism. ... See full document

... polyglycine modified electrode was prepared by cyclic ...the modified electrode was studied. A novel method for determination of epinephrine using cyclic voltammetry was ...the ... See full document

... functionalized-graphene modified graphite electrode (199 mV for AA and DA, 164 mV for DA and UA, and 363 mV for AA and UA) [25] and ERGO/GCE (240 mV for AA and DA, 130 mV for DA and ... See full document

... While modified electrode the formation of spindle-like nanostructures not only enlarges the surface area of the electrode and also improves the electron transfer rate between the electrode ... See full document

... indicates that the redox reaction involves a transfer process of two protons. The effect of solution pH on the electrochemical signal is similar to the effect of solution pH on carbon-loated nickel magnetic nanoparticles ... See full document

... PtNPs/GR modified electrode was successfully fabricated for the selective and quantitative detection of UA in the presence of DA and a very high concentration of ...the modified ... 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

... the modified electrode was applied to the determination of FA and UA in human urine ...proposed electrode system gave rise to better recoveries (Table 2) for the quantification of spiked two ... See full document

... [41], graphene, a novel two-dimensional (2D) carbon nanostructure, has garnered much attention due to its unique mechanical, physical and chemical ...that graphene possesses a high theoretical specific ... See full document

... NCSs modified electrode show an excellent electrocatalytic activity to oxidize small biological molecules (AA, DA and UA), and the oxidation peak do not appear to ... See full document

... and modified electrode characterized by scanning electron microscopy ...partic acid film on the GCE shows a more uniform sur- face topography with pycnotic nanostructure with round parvules (Figure ... See full document

... for determination of EP, DA, AA and UA ...composites modified GCE was fabricated by a one-pot electropolymerization protocol using DA as a reducing agent and a monomer, while HAuCl ... See full document