title: Studies of the electrochemical behavior of epinephrine at a homocysteine self-assembled electrode.
abstract: The self-assembled electrode with the homocysteine monolayer (Hcy/Au) has been characterized by infrared spectroscopy and ac impedance spectroscopy in electrolyte. The Hcy/Au electrode is demonstrated to promote the electrochemical response of epinephrine (E) by cyclic voltammetry. A pair of well-defined redox waves was obtained and the calculated standard rate constant (k(s)) is 2.1x10(-2) cms(-1) at the self-assembled electrode. The reduction peak of E can be used to determine the concentration of E in presence of ascorbic acid (AA) owing to the Hcy/Au also promoting the electrochemical oxidation of AA.
authors.affiliation: Department of Chemistry, Peking University, Beijing 100871, People's Republic of China.
authors.forename: Hui-Min
authors.initials: HM
authors.lastname: Zhang
authors.forename: Xian-Liang
authors.initials: XL
authors.lastname: Zhou
authors.forename: Ru-Tai
authors.initials: RT
authors.lastname: Hui
authors.forename: Nan-Qiang
authors.initials: NQ
authors.lastname: Li
authors.forename: De-Pei
authors.initials: DP
authors.lastname: Liu