Potencial de uso de aminoácidos e aminas bioativas livres como índice de autenticidade e qualidade de farinhas de origem animal

Abstract

The animal protein industry generates a large amount of waste and non-edible by-products with high pollutant power. Animal meals are good sources of protein and a good alternative for the use of these residues in animal feed. However, the quality and authenticity of these products must be guaranteed. The objective of this work was to investigate the quality of four types of animal meal (poultry viscera, swine viscera, meat and bones, and hydrolyzed poultry feathers) produced by an industry under federal inspection and to investigate the possibility of generating indexes for quality and authenticity. Analyzes of, physic-chemical composition and microbiological characteristics were performed according to current legislation. Amino acids, bioactive amines and mercury were also analyzed by UPLC. Samples were also analyzed by infrared (FTIR). All samples complied with current legislation, even though there was a difference (p <0.05) in the results among factories. All animal meals contained mercury at contents 0.1 mg/kg, with no difference among the different types of meal. There was significant difference on the profile and contents of amino acids and amines for the different types of meal. Multivariate analysis with all constituents analyzed and FTIR data differentiated only the feather meal from the others