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| Electrochermical determinnation of catechol with nano- gold/carbon nanotubes modified graphite electrode. |
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Abstract Surface of carbon nanotubes (CNTs) supported gold (Au) nanoparticles was prepared by spontaneous reduction of HAuCl4 aqueous solution, and as-prepared Au-CNTs/C electrodes show high electrocatalytic performance for CAT. The electrochemical behaviors of Au-CNTs/C elecrodes were investigatated by cyclic votammetry. It was obtained a well-shaped redox reactin at Au-CNTs/C elecrodes, and oxidation peak of catechol was obviously observed at 0.25V. Additional, linear relationship was obtained between Ipa and concentration of catechol in the range of 5.0′10-7~ 5.0′10-3mol/L in phosphate buffer solution (pH 7.4), with a correlation coefficient of 0.9992, and the detection limit of this method was found to be 3.3′10-7mol/L.
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Received: 02 February 2010
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