title: Near-infrared reflectance spectroscopy for predicting amino acids content in intact processed animal proteins.
abstract: Near-infrared calibrations were developed for the instantaneous prediction of amino acids composition of processed animal proteins (PAPs). Two sample presentation modes were compared (ground vs intact) for demonstrating the viability of the analysis in the intact form, avoiding the need for milling. Modified partial least-squares (MPLS) equations for the prediction of amino acids in PAPs were developed using the same set of samples (N = 92 PAPs) analyzed in ground and intact form and in three cups differing in the optical window size. The standard error for cross validation (SECV) and the coefficient of determination (1-VR) values yielded with the calibrations developed using the samples analyzed in the intact form showed similar or even better accuracy than those obtained with finely ground samples. The excellent predictive ability (1-VR > 0.90; CV < 3.0%) obtained for the prediction of amino acids in intact processed animal proteins opens an enormous expectative for the on-line implementation of NIRS technology in the processing and marketing of these important protein feed ingredients, alleviating the costs and time associated with the routine quality controls.
authors.affiliation: Department of Animal Production, E T S I A M, Universidad de Córdoba (UCO), Avda. Menéndez Pidal s/n, 14080 Córdoba, Spain. pa2hacem@uco.es
authors.forename: Maria José
authors.initials: MJ
authors.lastname: De la Haba
authors.forename: Ana
authors.initials: A
authors.lastname: Garrido-Varo
authors.forename: José Emilio
authors.initials: JE
authors.lastname: Guerrero-Ginel
authors.forename: Dolores C
authors.initials: DC
authors.lastname: Pérez-Marín
mesh_terms: D000596:Amino Acids / Q000032:analysis*; D000821:Animal Feed / Q000032:analysis; D000818:Animals; D001842:Bone and Bones / Q000737:chemistry; D002417:Cattle; D008461:Meat Products / Q000032:analysis; D011202:Poultry Products / Q000032:analysis; D011506:Proteins / Q000737:chemistry*; D019265:Spectroscopy, Near-Infrared; D013552:Swine
chemical_list: D000596:Amino Acids; D011506:Proteins