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Antioxidation on litsea cubebaes oil by ethanol reflux method

ZHENG Shu-ying;Department of Chemistry,Ningde Normal University;  
With fresh litsea cubeba(Lour) pers as raw material,the essential oil was extracted by water stream evaporation and ultrasonic-assisted water stream evaporation methods.The antioxidant effect on lard was studied with the obtained samples by contrast with blank.Then we studied the antioxidation on litsea cubeba essential oil by the test of DPPH free radical and superoxide anion free radical quenching.The result was obtained as follow:Litsea cubeba essential oil had a great antioxidant effect on lard and antioxidant had effects with addition.The peroxide value by adding 0.25,1,4 g litsea cubeba essential oil turned to 20.16,17.31,13.62 meq/kg after 15 days.At this time,the blank sample peroxide value reached 60.54 meq/kg.DPPH free radical and the superoxide anion free radical quenched quickly by using litsea cubeba essential oil.The quenching rate of it reached 81.35% and58.22% respectively.The study provided theoretical basis to the development and utilization of litsea cubeba essential oil.
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