Feasibility study on the use of infrared spectroscopy for the direct authentication of Iberian pig fattening diet.
Anal Chim Acta
; 636(2): 183-9, 2009 Mar 23.
Article
em En
| MEDLINE
| ID: mdl-19264166
ABSTRACT
The feasibility of using both middle- and near-infrared spectroscopy for discrimination between subcutaneous fat of Iberian pigs reared on different fattening diets has been evaluated. The sample set was formed by subcutaneous fat of pigs fattened outdoors (extensively) with natural resources (montanera) and pigs fattened on commercial feeds, either with standard feed or with especial formulations with higher content in oleic acid (HO-formulated feed). Linear discriminant analysis was used to classify the samples according to the fattening diet using the scores obtained from principal component analysis of near- and middle-infrared spectra as variables to construct the discriminant functions. The most influential variables were identified using a stepwise procedure. The discriminant potential of each spectral region was investigated. Best results were obtained with the combination of both regions with 91.7% of the standard feed and 100% of montanera and HO-formulated feed samples correctly classified. Chemical explanations are provided based on the correlation of these variables with fatty acid content in the samples.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Espectroscopia de Infravermelho com Transformada de Fourier
/
Espectroscopia de Luz Próxima ao Infravermelho
/
Gordura Subcutânea
Tipo de estudo:
Prognostic_studies
Limite:
Animals
Idioma:
En
Ano de publicação:
2009
Tipo de documento:
Article