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Electrochemical Sensing of Catecholamines at the Water/ 1,6‐Dichlorohexane Interface
Author(s) -
Ribeiro José A.,
Silva F.,
Pereira Carlos M.
Publication year - 2013
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.201300302
Subject(s) - ascorbic acid , dopamine , electrochemistry , detection limit , chemistry , cyclic voltammetry , selectivity , voltammetry , square wave , inorganic chemistry , analytical chemistry (journal) , chromatography , electrode , biochemistry , medicine , voltage , catalysis , food science , physics , quantum mechanics
In this work, the analytical use of facilitated ion transfer of catecholamines by dibenzo‐18‐crown‐6 was investigated at the water/1,6‐dichlorohexane interface using electrochemical methods (cyclic and square wave voltammetry). The experimental conditions for the analytical determination of noradrenaline and dopamine were established and detection limits of 1.7 and 0.35 µM were obtained, respectively. The effect of excess ascorbic acid on the transfer and detection of the two catecholamines was investigated. The selectivity coefficients obtained for dopamine and noradrenaline in the presence of ascorbic acid were 3.5×10 −4 and 2.5×10 −3 , respectively.