title: Study on electrochemical behavior of tryptophan at a glassy carbon electrode modified with multi-walled carbon nanotubes embedded cerium hexacyanoferrate.
abstract: Electrochemical behavior of cerium hexacyanoferrate (CeHCF) incorporated on multi-walled carbon nanotubes (MWNTs) modified GC electrode is investigated by scanning electron microscopy (SEM) and electrochemical techniques. The CeHCF/MWNT/GC electrode showed potent electrocatalytic activity toward the electrochemical oxidation of tryptophan in phosphate buffer solution (pH 7.0) with a diminution of the overpotential of 240mV. The anodic peak currents increased linearly with the concentration of tryptophan in the range of 2.0x10(-7) to 1.0x10(-4)M with a detection limit of 2.0x10(-8)M (at a S/N=3). And the determination of tryptophan in pharmaceutical samples was satisfactory.
authors.affiliation: College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, China; Anhui Key Laboratory of Functional Molecular Solids, Wuhu 241000, China.
authors.forename: Bin
authors.initials: B
authors.lastname: Fang
authors.forename: Yan
authors.initials: Y
authors.lastname: Wei
authors.forename: Maoguo
authors.initials: M
authors.lastname: Li
authors.forename: Guangfeng
authors.initials: G
authors.lastname: Wang
authors.forename: Wei
authors.initials: W
authors.lastname: Zhang