3.2.1. Secondary lipid oxidation during storage
Secondary lipid oxidation products were monitored throughout the storage period of 60 days at the surface (S) and the inner part (I) of pork patties packaged in standard vacuum packaging (C), rosemary active packaging (R), and oxygen scavenger packaging (OS), and subsequently subjected to HPP (700 MPa, 10 min, 5 C) and cold stored (5 C) in the dark (Fig. 2). The initial levels of oxidation at days 1 and 5 were the same for all the samples (Fig. 2). Notably, an almost constant level of oxidation is seen until day 5, after which the different treatments resulted in different develop- ments in oxidation with a peak at day 17 for standard vacuum