dc.contributor.author | Oca Casado, Mª Leticia | |
dc.contributor.author | Ortiz Fernández, Mª Cruz | |
dc.contributor.author | Sarabia Peinador, Luis Antonio | |
dc.contributor.author | Gredilla, A.E. | |
dc.contributor.author | Delgado, D. | |
dc.date.accessioned | 2016-11-24T10:38:33Z | |
dc.date.available | 2016-11-24T10:38:33Z | |
dc.date.issued | 2012-09 | |
dc.identifier.uri | http://hdl.handle.net/10259/4287 | |
dc.description.abstract | Near-infrared transmittance (NIT) spectroscopy was used to predict the percentage in weight of the fat, dry matter, protein and fat/dry matter contents in Zamorano cheeses, protected with a Designation of Origin by the European Union. A total of 42 cheeses submitted to official control were analysed by reference methods. Samples were scanned (850–1050 nm) and predictive equations were developed using Partial Least Squares regression with a cross-validation step. Eight pretreatments independent from the remaining calibration samples were first considered. The most adequate one was that performing the second derivative (using a Savitzky–Golay method with a nine-point window and a second-order polynomial) followed by the standard normal variate transformation. Percentages of the root mean square error in cross-validation, the coefficient of determination and the mean of the absolute value of relative errors found were, respectively, for fat (0.62; 96.16; 1.05), dry matter (0.76; 96.03; 0.83), protein (0.41; 97.82; 0.81) and the fat/dry matter ratio (0.61; 92.51; 0.66). At a 99% confidence level, the trueness of the NIT+PLS methods for fat, dry matter and protein was verified. The official regulation for Zamorano cheese demands minimum permitted limits on the percentages in weight for protein (25%), dry matter (55%) and the ratio of fat to dry matter (45%). The adaptation of both the decision limit and the detection capability to the case of a minimum permitted limit (CDα and CDβ, respectively) when a Partial Least Squares calibration is used has been applied for the first time for a food product protected by a Designation of Origin. The values of CDα with a probability of false non-compliance equal to 0.05 and of CDβ when, in addition, the probability of false compliance was equal to or less than 0.05, both provided by the corresponding NIT+PLS-based method, were, respectively, for protein (24.78%; 24.57%), dry matter (54.14%; 53.28%) and the fat/dry matter ratio (44.39%; 43.78%). | en |
dc.description.sponsorship | authorsthankthefinancialsupportprovidedbyMinisterio de CienciaeInnovacio´n (CTQ2011-26022)andJuntadeCastillay Leo´n (BU108A11-2) | en |
dc.format.mimetype | application/pdf | |
dc.language.iso | eng | es |
dc.publisher | Elsevier | en |
dc.relation.ispartof | Talanta Volume 99, 15 September 2012, Pages 558–565 | en |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 International | |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | |
dc.subject.other | Chemistry | en |
dc.subject.other | Mathematics | en |
dc.subject.other | Química | es |
dc.subject.other | Matemáticas | es |
dc.title | Prediction of Zamorano cheese quality by near-infrared spectroscopy assessing false non-compliance and false compliance at minimum permitted limits stated by designation of origin regulations | en |
dc.type | info:eu-repo/semantics/article | |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | |
dc.relation.publisherversion | http://dx.doi.org/10.1016/j.talanta.2012.06.035 | |
dc.type.hasVersion | info:eu-repo/semantics/acceptedVersion | en |
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