y
下转第107页
f第28卷第4期
李咏梅等共振光散射法测定食用油中铁含量
107
RSDwaslesstha
3，a
drecoverywasi
thera
geof97．3～102．5．Thismethodwasse
sitive，accurate，simple，rapid，precise，efficie
ta
de
viro
me
tallyfrie
dly，whichcouldcompletelymeetthea
alysisrequireme
tsofi
ro
co
te
ti
edibleoil．
Keywords
reso
a
celightscatteri
gmethod，edibleoil，iro

上接第50页
seedoiltoscave
geDPPHfreeradicalsa
ddegreeofperoxidatio
oftwosamplesobtai
edbypressi
ga
dthesupercriticalCO2extractio
methodrespectivelywerei
vestigated．Theresultsshowedthatextractio
timehadthegreatestimpacto
extractio
rate，followedbyextractio
temperature，extractio
pressurewastheleast．Theoptimalprocessco
ditio
sofsupercriticalCO2extractio
methodweretemperature35℃，pressure30MPaa
dthetime60mi
，theoilextractio
ratewas28．86．Theco
te
tofu
saturatedfattyacidreachesashighas90ofpeo
yseedoil，whilethea
tioxida
tpropertyofseedoilissimilartofat－solublea
tioxida
tSupercriticaloilsremovalabilityofDPPHradicalwassig
ifica
tlyhighertha
pressedoil，a
dlipidperoxidedegreei
ducedbyFe
2
waslesstha
pressedoil，whichmea
s
supercriticalpeo
yseedoilextractedbysupercriticalCO2extractio
methodsuperiorstopressedoil．So，supercriticalCO2extractio
methodisrecomme
dedforextracti
ghighvalue－addedpeo
yseedoil．
Keywords
peo
yseedoil，supercriticalCO2extractio
，fattyacidcompositio
，a
tioxidatio
activity
fr