Selective determination of dopamine in presence of ascorbic acid and uric acid at hydroxy double salt/surfactant film modified carbon paste electrode

Autor:	B.E. Kumara Swamy, T.V. Sathisha, B. Eswarappa, Bananakere Nanjegowda Chandrashekar, Nygil Thomas
Rok vydání:	2012
Předmět:	Detection limit General Chemical Engineering Inorganic chemistry Ascorbic acid Electrochemistry Analytical Chemistry chemistry.chemical_compound Double salt chemistry Pulmonary surfactant Uric acid Selectivity Voltammetry Nuclear chemistry
Zdroj:	Journal of Electroanalytical Chemistry. 674:57-64
ISSN:	1572-6657
DOI:	10.1016/j.jelechem.2012.03.020
Popis:	A sensitive and selective electrochemical method using a hydroxy double salt/surfactant film modified carbon paste electrode (HDS/SDS/CPE) was developed for the electrochemical determination of dopamine. The HDS/SDS/CPE shows an excellent electrocatalytic activity towards the oxidation of dopamine in 0.1 M phosphate buffer solution (pH 7.4) and the detection limit of DA was 1 × 10−7 M. The interference studies showed that the modified electrode exhibits an excellent selectivity towards dopamine (DA) in the presence of large excess of ascorbic acid (AA) and uric acid (UA). The separation of the oxidation peak potentials for DA–AA and DA–UA were about 187.8 mV and 110.7 mV respectively. The differences are large enough to determine AA, DA and UA individually and simultaneously. This work provides a simple and easy approach to selectively detect the dopamine in the presence of ascorbic acid and uric acid in physiological samples.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d52442ac9aaef5d7b07b23dba212a2d7 https://doi.org/10.1016/j.jelechem.2012.03.020 Zobrazit plný text záznamu Full Text from ScienceDirect