Selective Detection of Dopamine in the Presence of Ascorbic Acid at Poly (m-Aminobenzene Sulfonic Acid)

作     者：Gamze Erdogdu Mehmet Mutluhan Mutlu 

作者机构：Department of ChemistryFaculty of Arts and SciencesInonu UniversityMalatyaTurkey Department of ChemistryFaculty of Arts and SciencesHarran UniversitySanliurfaTurkey 

出 版 物：《American Journal of Analytical Chemistry》 (美国分析化学（英文）)

年 卷 期：2011年第2卷第5期

页      面：582-588页

学科分类：07[理学] 0703[理学-化学] 

基　　金：financially supported by the Research Fund Unit of Inonu University(Grant no APYB:2008/48) 

主　　题：Poly(m-Aminobenzene Sulfonic Acid) Dopamine Ascorbic Acid 

摘      要：Poly (m-aminobenzene sulfonic acid, m-ABSA) films were electrochemically prepared by cyclic voltammetry (CV) in 0.1 mol L–1 KCl solution. The dopamine (DA) selectivity of polymeric electrodes prepared at the different thicknesses was examined in the presence of ascorbic acid (AA). The results showed that the modified electrode showed an excellent electrocatalytical effect towards oxidation of dopamine (DA) and ascorbic acid (AA). Electrostatic interaction between the negatively charged poly(m-ABSA) film and either cationic DA species or anionic AA species favorably contributed to the redox response of DA and AA. Moreover, the regular and repetitive responses for dopamine were obtained even in the presence of the some interfering substances such as ascorbic acid, NaCl, NaClO4, Na2SO4 ,NaNO3 and KCl.