title: Voltammetric classification of ciders with PLS-DA.
abstract: Voltammograms recorded on the glassy carbon electrode (GCE) may be a chemical fingerprints of food samples, enabled distinguishing the origin of the considered products. In this work the objects of the study was 5 Polish ciders of various brands. For each sample 10 scans were recorded by DPV in the potential range between -0.2 and 1.0 V in Britton-Robinson buffer at pH 2.0. The signals preprocessing realized by baseline correction with 4-th degree polynomial and normalization (in 0 to 1 interval), performed to reduce problems with insufficient signal's repeatability associated with mechanical renovation of the electrode surface before each measurement. The PLS-DA classification models were built using the training set and then validated using the samples absent in the learning process. The final multi-class model with optimized complexity enables classification of the ciders with 100% sensitivity and specificity, with the exception of one cider, where specificity was 95% (for validation set).
authors.affiliation: Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Mickiewicza 30, 30-059 Kraków, Poland.
authors.forename: Łukasz
authors.initials: Ł
authors.lastname: Górski
authors.affiliation: Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Mickiewicza 30, 30-059 Kraków, Poland.
authors.forename: Wanda
authors.initials: W
authors.lastname: Sordoń
authors.affiliation: Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Mickiewicza 30, 30-059 Kraków, Poland.
authors.forename: Filip
authors.initials: F
authors.lastname: Ciepiela
authors.affiliation: Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Mickiewicza 30, 30-059 Kraków, Poland.
authors.forename: Władysław W
authors.initials: WW
authors.lastname: Kubiak
authors.affiliation: Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Mickiewicza 30, 30-059 Kraków, Poland. Electronic address: jakubows@agh.edu.pl.
authors.forename: Małgorzata
authors.initials: M
authors.lastname: Jakubowska
mesh_terms: D001628:Beverages / Q000145:classification*; D002244:Carbon / Q000737:chemistry; D016002:Discriminant Analysis; D004563:Electrochemistry / Q000295:instrumentation / Q000379:methods*; D004566:Electrodes; D005898:Glass / Q000737:chemistry; D016018:Least-Squares Analysis
chemical_list: D002244:Carbon
keywords: Cider; Glassy carbon electrode; PLS-DA; Voltammetry