Authentication of the <i>Montanera</i> Period on Carcasses of Iberian Pigs by Using Analytical Techniques and Chemometric Analyses
Miriam Hernández-Jiménez,
Isabel Revilla,
Lourdes Arce,
María José Cardador,
Rocío Ríos-Reina,
Inmaculada González-Martín,
Ana María Vivar-Quintana
Affiliations
Miriam Hernández-Jiménez
Food Technology, Universidad de Salamanca, E.P.S. de Zamora, Avda. Requejo 33, 49022 Zamora, Spain
Isabel Revilla
Food Technology, Universidad de Salamanca, E.P.S. de Zamora, Avda. Requejo 33, 49022 Zamora, Spain
Lourdes Arce
Department of Analytical Chemistry, Institute of Fine Chemistry and Nanochemistry, Marie Curie Annex Building, University of Córdoba, Campus de Rabanales, E-14071 Córdoba, Spain
María José Cardador
Department of Analytical Chemistry, Institute of Fine Chemistry and Nanochemistry, Marie Curie Annex Building, University of Córdoba, Campus de Rabanales, E-14071 Córdoba, Spain
Rocío Ríos-Reina
Department of Analytical Chemistry, Institute of Fine Chemistry and Nanochemistry, Marie Curie Annex Building, University of Córdoba, Campus de Rabanales, E-14071 Córdoba, Spain
Inmaculada González-Martín
Analytical Chemistry, Nutrition and Bromatology, Universidad de Salamanca, C/Plaza de Los Caídos s/n, 37008 Salamanca, Spain
Ana María Vivar-Quintana
Food Technology, Universidad de Salamanca, E.P.S. de Zamora, Avda. Requejo 33, 49022 Zamora, Spain
The potential of two complementary analytical techniques (near infrared spectroscopy, NIRS and gas chromatography–ion mobility spectrometry, GC-IMS) was used to establish the time that Iberian pigs have been fed on acorns and pasture and to verify their genetic purity. For both techniques it was neither necessary to carry out any chemical treatment in advance nor to identify individual compounds. The results showed that both the NIR spectrum and the spectral fingerprint obtained by GC-IMS were affected by the time that the Iberian pig feeds on natural resources. High percentages of correct classification were achieved in the calibration for both techniques: >98% for the days of montanera and >96% for the breed by NIRS and >99% for the days of montanera and >98% for the breed by GC-IMS. The results obtained showed that NIR spectra taken from intact samples is a quick classification method according to the time of montanera and breed.
