Simultaneous voltammetric determination of heavy metals by use of crown ether-modified electrodes and chemometrics
González-Calabuig, Andreu (Universitat Autònoma de Barcelona. Departament de Química)
Guerrero, David (Universitat Autònoma de Barcelona. Departament de Química)
Serrano i Plana, Núria (Universitat de Barcelona. Departament de Química Analítica)
Valle Zafra, Manuel del (Universitat Autònoma de Barcelona. Departament de Química)

Data:	2016
Resum:	A three-sensor array consisting of a graphite-epoxy composite electrode (GEC), 4-carboxybenzo-18-crown-6-GEC and 4- carboxybenzo-15-crown-5-GEC was employed for the simultaneous determination of Cd(II), Pb(II) and Hg(II) by differential pulse anodic stripping voltammetry (DPASV). Sensors were firstly studied for the determination of Hg(II); secondly, peak current responses confirmed that all sensors showed differentiated response for the three considered metals. A response model was developed to resolve mixtures of Cd(II), Pb(II) and Hg(II) at the μg L⁻¹ level; Discrete Wavelet Transform was selected as preprocessing tool and artificial neural network used for the modelling of the obtained responses.
Ajuts:	Ministerio de Economía y Competitividad CTQ2013-41577-P Ministerio de Economía y Competitividad CTQ2012-32863
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Crown ether-modified sensors ; Electrochemical grafting ; Heavy metal ; Stripping voltammetry ; Artificial neural network
Publicat a:	Electroanalysis, Vol. 28, Issue 4 (April 2016) p. 663-670, ISSN 1521-4109

DOI: 10.1002/elan.201500512

Post-print 9 p, 1.2 MB

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