Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 106, Issue 2, Pages 619-625Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2004.07.031
Keywords
N,N '-ethylenebis(salicylideneiminato)oxovanadium(IV); modified electrode; sensor; cysteine
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The electrochemical behavior of a carbon paste electrode modified (CPEM) with N,N '-ethylenebis(salicylideneiminato)oxovanadium(IV) complex ([(VO)-O-IV(Salen)]) was investigated as a new sensor for cysteine. Cyclic voltammetry at the modified electrode in 0.1 mol L-1 KCl Solution (pH 5.0) showed a single-electron reduction/oxidation of the Couple VO3+/VO2+. The CPEM with [VO(Salen)] presented good electrochemical stability in a wide pH range (4.0-10.0) and an ability to electrooxidate cysteine at 0.65 V versus SCE. These results demonstrate the viability of the use of this modified electrode as an amperometric sensor for cysteine determination. (c) 2004 Elsevier B.V. All rights reserved.
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