Study on electrochemical behavior of tryptophan at a glassy carbon electrode modified with multi-walled carbon nanotubes embedded cerium hexacyanoferrate.
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.
Fang
Bin
B
College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, China; Anhui Key Laboratory of Functional Molecular Solids, Wuhu 241000, China.
Wei
Yan
Y
Li
Maoguo
M
Wang
Guangfeng
G
Zhang
Wei
W