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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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Electrocatalyticmeasurementofmethionineconcentrationwithacarbonnanotubepasteelectrodemodifiedwithbenzoylferrocene
DOI: 10.1016/S1872-2067(12)60582-8, PP. 1333-1338
Keywords: Methionine,Electrocatalysis,Carbonnanotube,Chemicallymodifiedelectrode,Voltammetry,Benzoylferrocene
Abstract:
？Abenzoylferrocenemodifiedmulti-wallcarbonnanotubepasteelectrodeforthemeasurementofmethionine(MET)concentrationisdescribed.METelectrochemicalresponsecharacteristicsofthemodifiedelectrodeinaphosphatebuffersolutionofpH7.0wereinvestigatedbycyclicvoltammetry,squarewavevoltammetry,andchronoamperometry.Underoptimizedconditions,thesquarewavevoltammetricpeakcurrentofMETincreasedlinearlywithMETconcentrationintherangeof1.0×10-7to2.0×10-4mol/L.Thedetectionlimitwas58.0nmol/LMET.Thediffusioncoefficient(D=5.62×10-6cm2/s)andelectrontransfercoefficient(α=0.4)forMEToxidationwerealsodetermined.ThesensorwassuccessfullyappliedforthemeasurementofMETconcentrationinhumanurine.
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