Control of olive cultivar irrigation by front-face fluorescence excitation-emission matrices in combination with PARAFAC
| Autor: | Manuel Cabrera-Bañegil, Emanuele Boselli, Daniel Martín-Vertedor, Isabel Durán-Merás |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Irrigation
Pulp (paper) 010401 analytical chemistry Catechin 04 agricultural and veterinary sciences engineering.material 040401 food science 01 natural sciences Fluorescence 0104 chemical sciences chemistry.chemical_compound 0404 agricultural biotechnology chemistry Oleuropein Polyphenol engineering Vanillic acid Cultivar Food science Food Science |
| Zdroj: | Journal of Food Composition and Analysis. 69:189-196 |
| ISSN: | 0889-1575 |
| DOI: | 10.1016/j.jfca.2018.01.021 |
| Popis: | Due to their antioxidant properties, biophenolic compounds from vegetables and derived products are very demanded by the consumers. The olive fruit pulp is rich in these compounds, and, in this paper, the influence of irrigation on the levels of these compounds has been investigated. Methanolic extracts from olive paste samples submitted to different irrigation treatments were analyzed by front-face fluorescence. Excitation-emission matrices, recorded as a set of emission spectra in the range 290–450 nm, and in the excitation range of 240–290 nm, were analyzed by means of Parallel Factor Analysis (PARAFAC). The loadings and scores corresponding to three components were obtained. In the same samples, polyphenols were also analyzed by chromatography. High correlations were found between the first component PARAFAC scores and epicatechin (R = 0.856) and catechin plus epicatechin concentrations (R = 0.873), second component scores and oleuropein (R = 0.892, only when epicatechin concentration is lower than 0.55 mg/L) and the third component scores and vanillic acid concentrations (R = 0.877). The representation of the two first PARAFAC component scores allowed discriminate between the different irrigation treatments. Polyphenol concentrations obtained by both methods were analyzed statistically by ANOVA and Duncans multiple test. The obtained results showed significant differences between the irrigation treatments. |
| Databáze: | OpenAIRE |
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