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Optimization of NIR Spectral Data Management for Quality Control of Grape Bunches during On-Vine Ripening
dc.contributor.author | González Caballero, Virginia | |
dc.contributor.author | López, María Isabel | |
dc.contributor.author | Sánchez, María-Teresa | |
dc.contributor.author | Pérez-Marín, D.C. | |
dc.date.accessioned | 2017-11-07T13:22:49Z | |
dc.date.available | 2017-11-07T13:22:49Z | |
dc.date.issued | 2011 | |
dc.identifier.uri | http://hdl.handle.net/10396/15349 | |
dc.description.abstract | NIR spectroscopy was used as a non-destructive technique for the assessment of chemical changes in the main internal quality properties of wine grapes (Vitis vinifera L.) during on-vine ripening and at harvest. A total of 363 samples from 25 white and red grape varieties were used to construct quality-prediction models based on reference data and on NIR spectral data obtained using a commercially-available diode-array spectrophotometer (380–1,700 nm). The feasibility of testing bunches of intact grapes was investigated and compared with the more traditional must-based method. Two regression approaches (MPLS and LOCAL algorithms) were tested for the quantification of changes in soluble solid content (SSC), reducing sugar content, pH-value, titratable acidity, tartaric acid, malic acid and potassium content. Cross-validation results indicated that NIRS technology provided excellent precision for sugar-related parameters (r2 = 0.94 for SSC and reducing sugar content) and good precision for acidity-related parameters (r2 ranging between 0.73 and 0.87) for the bunch-analysis mode assayed using MPLS regression. At validation level, comparison of LOCAL and MPLS algorithms showed that the non-linear strategy improved the predictive capacity of the models for all study parameters, with particularly good results for acidity-related parameters and potassium content | es_ES |
dc.format.mimetype | application/pdf | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | MDPI | es_ES |
dc.rights | https://creativecommons.org/licenses/by/4.0/ | es_ES |
dc.source | Sensors 11, 6109-6124 (2011) | es_ES |
dc.subject | NIR spectroscopy | es_ES |
dc.subject | Quality parameters | es_ES |
dc.subject | On-vine | es_ES |
dc.subject | Bunch analysis | es_ES |
dc.title | Optimization of NIR Spectral Data Management for Quality Control of Grape Bunches during On-Vine Ripening | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.relation.publisherversion | http://dx.doi.org/10.3390/s110606109 | es_ES |
dc.relation.projectID | Junta de Andalucía. P09-AGR-5129 | es_ES |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es_ES |