Feasible application of a portable NIR-AOTF tool for on-field prediction of phenolic compounds during the ripening of olives for oil production

Journal of Agricultural and Food Chemistry
Andrea BellincontroFabio Mencarelli

Abstract

Olive fruits of three different cultivars (Moraiolo, Dolce di Andria, and Nocellara Etnea) were monitored during ripening up to harvest, and specific and total phenols were measured by HPLC (High Pressure Liquid Chromatography). On the same olive samples (n = 450), spectral detections were performed using a portable NIR (Near Infrared)-AOTF (Acousto Optically Tunable Filter) device in diffuse reflectance mode (1100-2300 nm). Prediction models were developed for the main phenolic compounds (e.g., oleuropein, verbascoside, and 3,4-DHPEA-EDA) and total phenols using Partial Least Squares (PLS). Internal cross-validation (leave-one-out method) was applied for calibration and prediction models developed on the data sets relative to each single cultivar. Validation of the models obtained as the sum of the three sample sets (total phenols, n = 162; verbascoside, n = 162; oleuropein, n = 148; 3,4-DHPEA-EDA, n = 162) were performed by external sets of data. Obtained results in term of R(2) (in calibration, prediction and cross-validation) ranged between 0.930 and 0.998, 0.874-0.942, and 0.837-0.992, respectively. Standard errors in calibration (RMSEC), cross-validation (RMSECV), and prediction (RMSEP) were calculated obtaining minimum e...Continue Reading

References

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Citations

Nov 18, 2014·Applied Optics·Laura Di SienoDavide Contini
Oct 2, 2012·Journal of the Science of Food and Agriculture·Andrea BellincontroRiccardo Gucci
Sep 17, 2013·Journal of the Science of Food and Agriculture·Federico Emanuele BarnabaFabio Mencarelli
Mar 10, 2015·Journal of Food Science and Technology·Elena GuzmánJosé A García-Mesa
Mar 26, 2016·Journal of the Science of Food and Agriculture·Julio Beltrán OrtegaJuan Gómez Ortega
Oct 29, 2013·Applied Spectroscopy·Cláudia A Teixeira dos SantosJoão A Lopes
Jan 1, 2013·Antioxidants·Maurizio ServiliAgnese Taticchi

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