title: Classification of plum spirit drinks by synchronous fluorescence spectroscopy.
abstract: Synchronous fluorescence spectroscopy was used in combination with principal component analysis (PCA) and linear discriminant analysis (LDA) for the differentiation of plum spirits according to their geographical origin. A total of 14 Czech, 12 Hungarian and 18 Slovak plum spirit samples were used. The samples were divided in two categories: colorless (22 samples) and colored (22 samples). Synchronous fluorescence spectra (SFS) obtained at a wavelength difference of 60 nm provided the best results. Considering the PCA-LDA applied to the SFS of all samples, Czech, Hungarian and Slovak colorless samples were properly classified in both the calibration and prediction sets. 100% of correct classification was also obtained for Czech and Hungarian colored samples. However, one group of Slovak colored samples was classified as belonging to the Hungarian group in the calibration set. Thus, the total correct classifications obtained were 94% and 100% for the calibration and prediction steps, respectively. The results were compared with those obtained using near-infrared (NIR) spectroscopy. Applying PCA-LDA to NIR spectra (5500-6000 cm(-1)), the total correct classifications were 91% and 92% for the calibration and prediction steps, respectively, which were slightly lower than those obtained using SFS.
authors.affiliation: Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37 Bratislava, Slovak Republic. Electronic address: jana.sadecka@stuba.sk.
authors.forename: J
authors.initials: J
authors.lastname: Sádecká
authors.affiliation: Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37 Bratislava, Slovak Republic.
authors.forename: M
authors.initials: M
authors.lastname: Jakubíková
authors.affiliation: Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37 Bratislava, Slovak Republic.
authors.forename: P
authors.initials: P
authors.lastname: Májek
authors.affiliation: Department of Composite Materials, Polymer Institute, Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava, Slovak Republic.
authors.forename: A
authors.initials: A
authors.lastname: Kleinová
mesh_terms: D000434:Alcoholic Beverages / Q000032:analysis*; D002138:Calibration; D016002:Discriminant Analysis; D025341:Principal Component Analysis / Q000379:methods / Q000592:standards; D000068242:Prunus domestica / Q000737:chemistry*; D013050:Spectrometry, Fluorescence / Q000379:methods* / Q000592:standards
keywords: Multivariate analysis; Near-infrared spectroscopy; Plum spirit drinks; Synchronous fluorescence spectroscopy