Effects of Natural Complex Antioxidants on Antioxidant Properties of Refined Gardenia Fruit Oil
The protective effects of natural compound antioxidants on refined gardenia fruit oil under frying con-ditions were investigated.Refined gardenia fruit oil was used as raw material,the free radical scavenging ability and lipid protection factor(Pf)values of natural antioxidants(grape seed extract,tea polyphenol,tea polyphenol palmi-tate,ascorbyl palmitate,rosemary extract)and synthetic antioxidants(dl-α-tocopherol,BHT,TBHQ)before and after dissolving with refined gardenia fruit oil were compared.The natural compound antioxidant compound formula was determined by D-optimal design analysis.The peroxide value,carbonyl value,anisidine value and main fatty acids of refined gardenia fruit oil were compared after TBHQ and natural compound antioxidants were added at 160 ℃.The free radical scavenging ability and the Pf value of oil were improved when the tea polyphenol palmitate,ascorbic palmitate,and rosemary extract dissolved in refined gardenia fruit oil.The Pf value of oil was also signifi-cantly improved by tea polyphenol.The compound formula of natural composite antioxidant was tea polyphenol 0.02 g/kg+tea polyphenol palmitate 0.33 g/kg+ascorbic palmitate 0.01 g/kg+rosemary extract 0.03 g/kg;the in-hibition effect on peroxidation value and carbonyl value of refined gardenia fruit oil was better than that of TBHQ,and the inhibition effect on anisidine value was similar to that of TBHQ after natural compound antioxidants was added,moreover,the protection of polyunsaturated fatty acids was developed with natural compound antioxidants.The an-tioxidant and oxidation stability of refined gardenia fruit oil were significantly increased with addition of natural com-pound antioxidants.
refined gardenia fruit oilnatural complex antioxidantsantioxidant properties
NETL
NSTL
万方数据
