3.2.1. Lipid oxidation and fatty acid profiles
No marked changes in PV of emulsion sausage were observed in
all samples during the first 4 days of storage (p > 0.05) (Fig. 2A). The sharp increase in PV was noticeable in the control during 6 days of storage (p < 0.05). Thereafter, a decrease in PV was found (p < 0.05). The decreased PV observed with extended storage time was pre- sumed to be due to the decomposition of hydroperoxides. Hydro- peroxides underwent decomposition, yielding a wide variety of decomposition products, including aldehydes, ketone, acid, etc. (Chaijan, Benjakul, Visessanguan, & Faustman, 2006). Efficacy in preventing lipid oxidation of SRPH was dose-independent. How- ever, PV of samples added with 1 and 3 g/100 g SRPH was not different throughout the storage (p > 0.05). Thus, SRPH could act as antioxidant in emulsion sausage in conjunction with vitamin E present in sunflower oil. This result reconfirmed in vitro