Prediction of chemical composition and peroxide value in unground pet foods by near‐infrared spectroscopy
The peroxide value (PV) quantify the amount of hydroperoxides in fats and oils, providing a measure of their oxidation level that negatively impact taste, flavour, odour, colour, texture and appearance (Frankel, 1988) and can be a valuable alternative to the quantification of antioxidant level of feed (Renzi et al., 2005). Therefore, the use of NIRS in predicting PV in dog food can be considered an important quality control analysis to be conducted by pet food manufacturers.
The aim of this work was to evaluate the potential of applying NIRS technology in predicting the chemical composition and PV of unground commercial extruded dog foods. The choice of using unground samples has the further advantage of reducing sample preparation time, an important aspect for pet food manufacturers needing a quick and reliable product quality control.