Simultaneous determination of ascorbic acid and dopamine at electro polymerized manganese (III)-5-[o-(1-imidazolyl)butoxy]phenyl-10,15,20-triphenyl porphrine chloride film modified glassy carbon electrode
Deng Xuerong; Wang Lishi; Zhang Shuifeng; Liu Xiaoxiao; Mo Jinyuan
| HERO ID | 4854484 |
|---|---|
| In Press | No |
| Year | 2006 |
| Title | Simultaneous determination of ascorbic acid and dopamine at electro polymerized manganese (III)-5-[o-(1-imidazolyl)butoxy]phenyl-10,15,20-triphenyl porphrine chloride film modified glassy carbon electrode |
| Authors | Deng Xuerong; Wang Lishi; Zhang Shuifeng; Liu Xiaoxiao; Mo Jinyuan |
| Journal | Chinese Journal of Analytical Chemistry / Fen Xi Hua Xue |
| Volume | 34 |
| Issue | 5 |
| Page Numbers | 637-641 |
| Abstract | The electropolymerization of manganese(III)-5-[o-(1-imidazolyl) butoxyl] phenyl-10, 15, 20-triphenylporphrine chloride (o-ImBPTPPMn (III) Cl) produces stable and electrochemically active film from strong acidic aqueous solutions. Cyclic voltammetry was used to study the in situ growth of poly(o-ImBPTPP Mn (III) Cl) films. The electrode was also employed to study the electrocatalytic oxidation of ascorbic acid (AA) and dopamine (DA), using cyclic voltammery. It has been found that the oxidation of AA at the surface of poly(o-ImBPTPP Mn (III) CI) films modified glassy carbon electrode occurs at a potential of about 407 mV more negative than. that of an unmodified glassy carbon electrode. Differential pulse voltammograms (DPV) of simultaneous determination of AA and DA exhibit linear dynamic rang from 2.0 x 10(-6) to 1.0 x 10(-4) mol/L and a detection limit of 1.0 mu mol/L for AA, and corresponding linear dynamic rang from 6.5 x 10(-7) to 2.6 x 10(-5) mol/L and a detection limit of 0.39 mu mol/l, for DA. In DPV, the poly (o-ImBPFPP Mn (III) Cl) films modified glassy carbon electrode could separate completely the oxidation peak potentials of AA and DA for about 240 mV present in the same buffer solution of 0.1 mol/L phosphate, though at the unmodified glassy carbon electrode the peak potentials were indistinguishable. This modified electrode was quite effective not only to detect AA and DA individually, but also to determine simultaneously each component concentration in the mixture, and they will not affect each other. |
| Doi | 10.1016/S1872-2040(06)60034-0 |
| Wosid | WOS:000241620500011 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Keyword | film modified electrode; manganese (III)-5-[o-(1-imidazolyl)butoxy]phenyl-10,15,20-triphenylporphrine chloride; electropolymerization; glassy carbon electrode; ascorbic acid; dopamine |