کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8888027 | 1628376 | 2018 | 28 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Fluorescence spectroscopy for discrimination of botrytized wines
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موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش تغذیه
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چکیده انگلیسی
Some botrytized wines with “protected designation of origin” have a high market price, thus they are prone to adulteration with cheaper alternatives. This work presents the use of fluorescence spectroscopy combined with chemometrics as a relatively fast and inexpensive tool to discriminate botrytized wines according to two classification criteria: (1) distinguishing between botrytized wines of different quality, namely four-, five-, and six butt wines, and essence; and (2) distinguishing between unadulterated and adulterated samples. Various emission and synchronous fluorescence spectra were recorded and compressed by principal component analysis (PCA) and then linear discriminant analysis (LDA) was performed. The best PCA-LDA results (the percentage of correct classification for each wine category in the prediction step) were obtained with fluorescence spectra recorded on raw samples. Regarding wines of different quality, four- and five butt wines as well as essences were 100% correctly classified, while six butt wine samples were 80% correctly classified using emission spectra excited at 390 or 460â¯nm as well as synchronous fluorescence spectra recorded at wavelength difference of 100â¯nm. Regarding unadulterated and adulterated samples, the percentages of correct classification were 60, 80, 80 and 100% for four-, five-, and six butt wines and essence, respectively, while adulterated samples were 100% correctly classified, in all cases, using synchronous fluorescence spectra recorded at wavelength difference of 100â¯nm.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Food Control - Volume 88, June 2018, Pages 75-84
Journal: Food Control - Volume 88, June 2018, Pages 75-84
نویسندگان
Jana Sádecká, Michaela JakubÃková, Pavel Májek,