Simultaneous determination of Cu, Pb, Cd, Ni, Co and Zn in bioethanol fuel by adsorptive stripping voltammetry and multivariate linear regression

Autor(es)

Nascimento, Danielle S. ^[1] ; Insausti, Matias ^[2] ; Band, Beatriz S. F. ^[3] ; Lemos, Sherlan G. ^[4]

Afiliação do(s) autor(es)

^[1] Univ Fed Paraiba. Dept Quim

^[2] Univ Nacl Sur. Dept Quim

^[3] Univ Nacl Sur. Dept Quim

^[4] Univ Fed Paraiba. Dept Quim

• Tipo de documento: Artigo Científico
• Fonte: FUEL; v. 137, p. 172-178, DEC 1 2014.
• Citações Web of Science: 0

Resumo

In this work it is proposed the one-voltammogram simultaneous determination of Cu(II), Pb(II), Cd(II), Ni(II), Co(II), and Zn(II) at ppb and sub-ppb levels in bioethanol fuel samples by adsorptive stripping voltammetry. Mixed ligands were employed providing stripping peaks for all analytes at the same voltammetric scan under optimized conditions. To perform the determination, multivariate linear regression aided by successive projections algorithm (SPA-MLR) was evaluated. The voltammograms were preprocessed with the asymmetric least squares (AsLS) baseline correction algorithm and the icoshift peak alignment tool. An excellent analytical performance was obtained, despite the inherent complexity of the simultaneous determination, with average apparent recovery = 96% +/- 16%, and better prediction results in comparison with the benchmark method of partial least squares (PLS). (C) 2014 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 08/57808-1 - Instituto Nacional de Ciências e Tecnologias Analíticas Avançadas - INCTAA
• Beneficiário: Celio Pasquini
• Modalidade de apoio: Auxílio à Pesquisa - Temático