Lipid and protein oxidation of emulsified chicken patties prepared using abdominal fat and skin

Skin (SK) and abdominal fat (AF) are by-products that are abundantly produced in poultry slaughterhouses. Skin is used in meat products, especially in sausages, but its use is related to microbiological contamination and susceptibility to oxidation. The aim of the present study was to evaluate the effect of SK replacement with AF on the quality characteristics of emulsified patties stored under freezing conditions (−18°C) for 90 D. The AF showed higher lipid content than did the SK, but the SK had a higher predominance of polyunsaturated fatty acids. Regarding the partial chemical composition, the treatments showed differences in moisture, lipids, and total collagen. The values for para-anisidine and carbonyl compounds at the end of 90 D of storage were not influenced by the incorporation of SK or AF. The judges also did not observe differences in the color and aroma of the emulsified products during the 90 D. Furthermore, volatile compounds considered oxidation markers were not detected at the end of the storage period. Given these results, emulsified patties made with SK or AF undergo, to a similar degree, low levels of lipid and protein oxidation when stored under freezing conditions (−18°C) for 90 D, which allows the use of some of these lipid sources in meat products.