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1、※分析检测食品科学2010,Vol.31,No.16253SupercriticalCarbonDioxideExtractionofOatBranOilandItsFattyAcidCompositionHANShun-yu1,2，SONGXue-mei2，ZHUXia2，SHANGXun-wu1(1.GansuKeyLaboratoryofCropGenetic&GermplasmEnhancement,Lanzhou730070,China；2.CollegeofFoodScienceandEngineering,GansuAgriculturalUniversity,Lanzhou
2、730070,China)Abstract：Theoptimalparametersforthesupercriticalcarbondioxide(SC-CO2)extractionofoatbranoilweredeterminedbyorthogonalarraydesigntobe:extractionpressure15MPa,extractiontemperature35℃andlengthofextraction3hours.Theoatbranoilobtainedwasclearandofgoldencolorandhadthecharacteristicsmellofo
3、at.Itsfattyacidcompositionandthatofpetroleumetherextraction-derivedoatbranoilwereanalyzedbygaschromatography-massspectrometry(GC-MS),andtheresultsrevealedthatthemajorfattyacidsfoundinSC-CO2extraction-derivedoatbranoilwerepalmiticacid(17.60%),stearicacid(1.32%),oleicacid(40.15%),linoleicacid(37.55%
4、),linolenicacid(1.89%)andelaidicacid(1.52%)andthatthesecom-poundsinitspetroleumetherextraction-derivedcounterpartwere15.90%,1.67%,38.38%,41.67%,1.63%,and1.32%,respectively.ThetotalcontentsofunsaturatedfattyacidsinSC-CO2extraction-derivedoatbranoilanditspetroleumetherextraction-derivedcounterpartwe
5、re81.11%and83.00%,respectively.Keywords：supercriticalfluidextraction；petroleumetherextraction；oatbranoil；fattyacidcomposition；GC-MS超临界-CO2萃取燕麦麸油及其脂肪酸分析韩舜愈1,2，宋雪梅2，祝霞2，尚勋武1(1.甘肃省作物遗传改良与种质创新重点实验室，甘肃兰州730070；2.甘肃农业大学食品科学与工程学院，甘肃兰州730070)摘要：采用正交试验考察超临界CO2萃取燕麦麸皮中燕麦油的最佳工艺技术参数，用GC-MS分析燕麦麸油的脂肪酸组成。结果表明：CO2
6、超临界萃取的最佳工艺参数为压力15MPa、温度35℃、时间3h，所得燕麦麸油澄清透明，呈金黄色，具有特殊的麦香味。超临界CO2萃取燕麦麸油中的脂肪酸主要有棕榈酸17.60%、硬脂酸1.32%、油酸40.15%、亚油酸37.55%、亚麻酸1.89%和反油酸1.52%；而石油醚萃取燕麦麸油中的脂肪酸主要有15.90%、1.67%、38.38%、41.67%、1.63%和1.32%。超临界CO2萃取与石油醚萃取燕麦麸油中的总不饱和脂肪酸分别占81.11%和83.00%。关键词：超临界萃取；石油醚萃取；燕麦麸油；脂肪酸分析；GC-MS分析中图分类号：TS224.4文献标识码：A文章编号：1002-
7、6630(2010)16-0253-05OatisanannualherbageplantbelongingtoAvenacultivarsintheworldisin5%to9%range[2].90%lipidexistssativaL.oftheGraminacea.Ingeneral,therearetwocultivarsinthebranandendospermofoatseeds.Generally,con
