title: Single-cultivar extra virgin olive oil classification using a potentiometric electronic tongue.
abstract: Label authentication of monovarietal extra virgin olive oils is of great importance. A novel approach based on a potentiometric electronic tongue is proposed to classify oils obtained from single olive cultivars (Portuguese cvs. Cobrançosa, Madural, Verdeal Transmontana; Spanish cvs. Arbequina, Hojiblanca, Picual). A meta-heuristic simulated annealing algorithm was applied to select the most informative sets of sensors to establish predictive linear discriminant models. Olive oils were correctly classified according to olive cultivar (sensitivities greater than 97%) and each Spanish olive oil was satisfactorily discriminated from the Portuguese ones with the exception of cv. Arbequina (sensitivities from 61% to 98%). Also, the discriminant ability was related to the polar compounds contents of olive oils and so, indirectly, with organoleptic properties like bitterness, astringency or pungency. Therefore the proposed E-tongue can be foreseen as a useful auxiliary tool for trained sensory panels for the classification of monovarietal extra virgin olive oils.
authors.affiliation: CIMO - Mountain Research Centre, Escola Superior Agrária, Instituto Politécnico de Bragança, Campus Santa Apolónia, Apartado 1172, 5301-855 Bragança, Portugal.
authors.forename: Luís G
authors.initials: LG
authors.lastname: Dias
authors.affiliation: CIMO - Mountain Research Centre, Escola Superior Agrária, Instituto Politécnico de Bragança, Campus Santa Apolónia, Apartado 1172, 5301-855 Bragança, Portugal.
authors.forename: Andreia
authors.initials: A
authors.lastname: Fernandes
authors.affiliation: Instituto Politécnico de Coimbra, ISEC, DEQB, Rua Pedro Nunes, Quinta da Nora, 3030-199 Coimbra, Portugal; CEB - Center of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal.
authors.forename: Ana C A
authors.initials: AC
authors.lastname: Veloso
authors.affiliation: LAQUIPAI - Laboratório de Química Inorgânica Pura e de Aplicação Interdisciplinar, Departamento de Química, Faculdade de Ciências da, Universidade do Porto, Rua Campo Alegre no. 687, 4169-007 Porto, Portugal.
authors.forename: Adélio A S C
authors.initials: AA
authors.lastname: Machado
authors.affiliation: CIMO - Mountain Research Centre, Escola Superior Agrária, Instituto Politécnico de Bragança, Campus Santa Apolónia, Apartado 1172, 5301-855 Bragança, Portugal.
authors.forename: José A
authors.initials: JA
authors.lastname: Pereira
authors.affiliation: CIMO - Mountain Research Centre, Escola Superior Agrária, Instituto Politécnico de Bragança, Campus Santa Apolónia, Apartado 1172, 5301-855 Bragança, Portugal; LSRE - Laboratory of Separation and Reaction Engineering - Associate Laboratory LSRE/LCM, Escola Superior Agrária, Instituto Politécnico de Bragança, Campus Santa Apolónia, Apartado 1172, 5301-855 Bragança, Portugal. Electronic address: peres@ipb.pt.
authors.forename: António M
authors.initials: AM
authors.lastname: Peres
mesh_terms: D055615:Electrical Equipment and Supplies; D031658:Olea / Q000737:chemistry*; D000069463:Olive Oil; D010938:Plant Oils / Q000737:chemistry* / Q000145:classification; D011786:Quality Control; D013030:Spain
chemical_list: D000069463:Olive Oil; D010938:Plant Oils
keywords: Extra virgin olive oil; Linear discriminant analysis; Potentiometric electronic tongue; Simulated annealing algorithm; Single olive cultivar