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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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Simultaneousandsensitivedetectionofdopamineanduricacidusingapoly(L-methionine)/goldnanoparticle-modifiedglassycarbonelectrode
DOI: 10.1016/S1872-2067(14)60022-X, PP. 423-429
Keywords: Voltammetry,Goldnanoparticle,Poly(L-methionine),Dopamine,Uricacid
Abstract:
？Anovelelectrochemicalsensorwasfabricatedbyelectrodepositionofgoldnanoparticlesonapoly(L-methionine)(PMT)-modifiedglassycarbonelectrode(GCE)toformanano-Au/PMTcomposite-modifiedGCE(nano-Au/PMT/GCE).Scanningelectronmicroscopyandelectrochemicaltechniqueswereusedtocharacterizethecompositeelectrode.Themodifiedelectrodeexhibitedconsiderableelectrocatalyticactivitytowardstheoxidationofdopamine(DA)anduricacid(UA)inphosphatebuffersolution(pH=7.00).DifferentialpulsevoltammetryrevealedthattheelectrocatalyticoxidationcurrentsofDAandUAwerelinearlyrelatedtoconcentrationovertherangeof5.0×10-8to10-6mol/LforDAand7.0×10-8to10-6mol/LforUA.Thedetectionlimitswere3.7×10-8mol/LforDAand4.5×10-8mol/LforUAatasignal-to-noiseratioof3.Accordingtoourexperimentalresults,nano-Au/PMT/GCEcanbeusedasasensitiveandselectivesensorforsimultaneousdeterminationofDAandUA.
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