[PDF] Top 20 Simultaneous electrochemical determination of ascorbic acid, dopamine and uric acid using hollow gold nanospheres modified electrode

... the determination of UA or DA, a major obstacle usually encountered is the interference of AA, which is usually present in high concentrations in the body fluids and can be oxidized at a potential close to that of ... See full document

... and electrochemical properties of NDCS is characterized through scanning electron microscopy (SEM), X-ray powder diffractometer (XRD), Raman Spectroscopy, X-ray Photoelectron Spectroscopy (XPS) and ... See full document

... selective determination in a ternary mixtures is of great importance in electrochemical ...recorded using a ternary mixture of 20µM DA,1mM AA, and 6mM UA at (a) unmodified electrode and (b) 5% ... See full document

... and modified electrode characterized by scanning electron microscopy ...separate gold nanoparticles were deposited on GCE, the surface presents spheroidal particles with well-distributed size, and ... See full document

... novel electrochemical sensor has been of considerable interest ...DA determination is the resolution between DA and coexisting species such as uric acid (UA) and ascorbic acid ... See full document

... The electrochemical experiments were performed using a CHI 410a potentiostat (CH Instruments, ...for electrode modifications. A conventional three-electrode system which consisting of Ag/AgCl ... See full document

... the modified electrode separated completely into three well-defined peaks with ...the modified electrode plays a catalytic effect on the oxidation of AA, DA, and UA, but the catalytic role of ... 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

... 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 close to that of ...chemically ... See full document

... Acetone modified carbon paste electrode (20%:80%) has been shown to be effective for dopamine ...showed electrode process was diffusion ...good electrochemical ability to separate the ... See full document

... Folic acid (N-[p-[[(2-amino-4-hydroxy-t-tpiridinyl) methyl] amino]-benzoyl]-L-glutamic acid) (FA) is widely distributed vitamin (vitamin M, vitamin BC and vitamin B9) and it is an important component of the ... See full document

... poly(SFO) modified glassy carbon electrode (poly(SFO)/GCE) for the simultaneous square wave adsorptive stripping voltammetric determination of DA and UA after simultaneous ... See full document

... The electrochemical behavior of ascorbic acid (AA) and dopamine (DA) at copper nanoparticles modified polycrystalline gold electrode (nano-Cu/Au) has been studied ... See full document

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

... as ascorbic acid and dopamine had different oxidation peak potentials at ...Chi/GR modified electrode greatly catalyzed the electrooxidation reactions of AA and DA, improving their ... See full document

... for electrode modification has previously been investigated for DA ...and simultaneous determination of AA and DA at micro molar levels in pharmaceutical ...quantitative determination of DA in ... See full document

... individual electrochemical behaviors of DA, AA, EP and UA at bare GCE ...PDA-nanogold modified electrode ...irreversible electrochemical behavior and a drawn out oxidation peak at 260 mV, 280 ... See full document

... simultaneous determination of UA and ...the electrode surface by the oxidation products could be achieved and the precise determination of UA in the presence of AA or the precise ... See full document

... many electrochemical approaches have been used to implement the above goal ...methods, using electroactive polymer-coated electrode to determine DA in the presence of AA and UA displayed excellent ... See full document

... the modified electrode ...of electrode to accelerate the ...nanocatalyst modified on the electrode, an increased redox peaks current ... See full document