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Self‐Assembled Submonolayer of β ‐Cyclodextrins on Gold Electrode for the Selective Determination of 4‐Aminobiphenyl
Author(s) -
Carrillo Idania,
Quintana Carmen,
Esteva Ana M.,
Hernández Lucas,
Hernández Pedro
Publication year - 2011
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201100499
Subject(s) - electrode , adsorption , desorption , selectivity , chemistry , molecule , analytical chemistry (journal) , cyclodextrin , square wave , inorganic chemistry , chromatography , organic chemistry , physics , voltage , quantum mechanics , catalysis
The formation of an inclusion complex between 4‐aminobiphenyl (4‐AB) and β ‐cyclodextrin molecules ( β ‐CD), allows the use of thiolated β ‐CDs as chemi‐adsorbed material on a Au electrode as a self‐assembled submonolayer for the selective square wave voltammetric determination of 4‐AB. The submonolayer was characterized by reductive desorption and an association constant of 1.2×10 4 L/mol was obtained. The optimization of variables yielded a linear dependence of ip/4‐AB concentration in the range of 10 −5 to 10 −4 mol/L. The selectivity of the method was evaluated in the presence of other aromatic amines obtaining better results with the modified electrode. This methodology was applied to the voltammetric determination of 4‐AB in wastewater samples.