Effects of Alternating Electric Field on Crude Oil Oxidation and Phenolic Acid in Storage
To explore the effect of alternating electric field treatment on the oxidation of edible crude oils and the potential factors,crude soybean and rapeseed oils were treated using the alternating electric field,investigating changes in major phenolic acid content during storage and the relationship between oxidation characteristics.The results indica-ted that alternating electric field treatment could significantly inhibit the increase of peroxide value(POV)and retard oxidation.Compared with the control group,the total phenolic acids of soybean and rapeseed oil in the electric field treatment group were significantly reduced by 20.1％and 25.2％during storage;the p-hydroxybenzoic acid,syringic acid,vanillin and sinapic acid in crude soybean oil significantly reduced by 18.4％、6.3％,46.8％and 21.4％,re-spectively,and crude rapeseed oil decreased by 56.0％、42.5％、2.9％and 23.6％,respectively,during storage.In the control group,the POV of soybean and rapeseed crude oil was positively correlated with the content of phenolic acid components to different degrees,while the electric field treatment was almost the opposite,especially crude soybean oil POV was significantly negatively correlated with the content of sinapic acid and vanillin,while there was a highly sig-nificantly negative correlation with the contents of sinapic acid in crude rapeseed oil.In summary,alternating electric field treatment promoted the consumption of phenolic acid in crude oil and delayed the oxidation of oil.
edible crude oilstoragealternating electric fieldphenolic acidsoil oxidation
NETL
NSTL
万方数据
