title: Determination of rutin on the poly(p-aminobenzene sulfonic acid) modified glassy carbon electrode.
abstract: The electrochemical behaviors of rutin at a poly(p-aminobenzene sulfonic acid) modified glassy carbon electrode (PABSA/GC) have been investigated. Rutin can generate a pair of well-defined redox peaks at the PABSA/GC located at 0.440 V (E(pa)) and 0.396 V (E(pc)) (vs. saturated calomel electrode (SCE)), respectively. The results indicate that the reaction involves two electrons transfer, accompanied by two protons and the electrochemical process is controlled by adsorption. The electrochemical parameters of rutin on the modified electrode were calculated with the results of the charge transfer coefficient (alpha), the number of electron transfer (n) and the electrode reaction rate constant (k(s)) as 0.61, 2.08 and 2.18 s(-1), respectively. Under the selected conditions, the oxidation peak current was linear to the rutin concentration over the range of 2.5x10(-7)-1.0x10(-5) M with a detection limit of 1.0x10(-7) M. The proposed method has been successfully applied to the determination of compound rutin tablets with no interference from the coexisting ascorbic acid.
authors.affiliation: Laboratory of Fiber Materials and Modern Textile, The Growing Base for State Key Laboratory, Qingdao University, Qingdao University, Qindao, Shandong, China.
authors.forename: Xiaoyin
authors.initials: X
authors.lastname: Chen
authors.forename: Zonghua
authors.initials: Z
authors.lastname: Wang
authors.forename: Feifei
authors.initials: F
authors.lastname: Zhang
authors.forename: Lingyan
authors.initials: L
authors.lastname: Zhu
authors.forename: Yanhui
authors.initials: Y
authors.lastname: Li
authors.forename: Yanzhi
authors.initials: Y
authors.lastname: Xia
mesh_terms: D002244:Carbon / Q000737:chemistry; D004563:Electrochemistry / Q000379:methods*; D004566:Electrodes; D057230:Limit of Detection; D012431:Rutin / Q000032:analysis*; D013425:Sulfanilic Acids / Q000737:chemistry*
chemical_list: D013425:Sulfanilic Acids; D012431:Rutin; D002244:Carbon