Comparison of visible and near infrared reflectance spectroscopy to discriminate between pasture-fed and concentrate-fed lamb carcasses

P H M Dian; D Andueza; M Jestin; I N Prado; S Prache

doi:10.1016/j.meatsci.2008.05.009

Comparison of visible and near infrared reflectance spectroscopy to discriminate between pasture-fed and concentrate-fed lamb carcasses

Meat Sci. 2008 Dec;80(4):1157-64. doi: 10.1016/j.meatsci.2008.05.009. Epub 2008 May 23.

Authors

P H M Dian¹, D Andueza, M Jestin, I N Prado, S Prache

Affiliation

¹ Institut National de la Recherche Agronomique, INRA, UR1213 Herbivores, Site de Theix, F-63122 Saint-Genès-Champanelle, France.

PMID: 22063851
DOI: 10.1016/j.meatsci.2008.05.009

Abstract

We compared visible and near infrared spectroscopy to distinguish pasture-fed (P) from stall concentrate-fed (S) lamb carcasses. A total of 120 P and 139 S lambs were used. The reflectance spectrum of perirenal fat was measured at wavelengths between 400 and 700nm using a portable spectrophotometer, and at wavelengths between 400 and 2500nm using a laboratory monochromator NIRSystem. In method W(450-510), the reflectance data were used at wavelengths between 450 and 510nm. In methods W(400-700) and W(400-2500), a multivariate analysis was performed over the full set of reflectance data, at wavelengths in the range 400-700nm and 400-2500nm, respectively. The proportion of correctly classified P lambs was 89.1%, 90.8% and 97.5% for W(450-510), W(400-700) and W(400-2500,)W(400-2500) performing best. The proportion of correctly classified S lambs was not significantly different between methods (98.6%, 98.6% and 97.8% for W(450-510), W(400-700) and W(400-2500), respectively).