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《分段提取香茅草精油及其對(duì)食用油脂的抗氧化活性研究》由會(huì)員上傳分享，免費(fèi)在線(xiàn)閱讀，更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫(kù)。
1、分段提取香茅草精油及其對(duì)食用油脂的抗氧化活性研究李曉嬌，劉憶明（保山學(xué)院資源環(huán)境學(xué)院，云南保山678000）摘要：目的：提取云南產(chǎn)香茅草精油，研究不同提餾段精油對(duì)食用油脂的抗氧化活性。方法：采用水蒸氣蒸餾法分段提取香茅精油，并以豬油和菜籽油為介質(zhì)，過(guò)氧化值（POV）為指標(biāo)，考察香茅精油的抗氧化活性，以BHT和BHA做對(duì)照。結(jié)果：水蒸氣蒸餾法提取香茅精油的最佳工藝為：料液比為1∶20，NaCl的質(zhì)量濃度為7g/L，提取時(shí)間為160min，總出油率為1.23%。GC-MS分析前20min和20～160min香茅精油中檸檬醛、橙花醛、橙花醇等主要成分的含量差別較大。香茅精油對(duì)豬油的抗氧化活性較
2、低。20～160min香茅精油對(duì)菜籽油有較好的抗氧化活性，與VC復(fù)合使用時(shí)，其對(duì)菜籽油的抗氧化活性與BHT相當(dāng)。20～160min精油對(duì)DPPH·的清除能力較BHT和BHA差，而其總抗氧化活性與BHT和BHA相當(dāng)。結(jié)論：香茅草精油具有較好的抗氧化活性，并且精油中高沸點(diǎn)物質(zhì)的活性大于低沸點(diǎn)物質(zhì)的活性。關(guān)鍵詞：香茅草精油，食用油脂，抗氧化活性，自由基清除能力StudyonantioxidantactivityoflemongrassessentialoilbystageextractionLIXiao-jiao，LIUYi-ming（SchoolofResourcesandEnvironme
3、nt，BaoshanUniversity，Baoshan678000，China）Abstract：Objective：TogetYunnanLemongrassessentialoilbystageextraction，thepaperinvestigatestheantioxidantactivityonediblefats.Methods：Withsteamdistillationstageextractiontoobtaintheessentialoil.Withthelardandrapeseedoilasthemedium，andthePeroxideValueasthein
4、dex，theantioxidantactivitiesofthetractsanditscollaborativeantioxidanteffectwithVCwereinvestigated.ThevariousantioxidantactivitieswerecomparedwiththeBHTandBHA.Results：Thetechnologyconditionsforextractingtheessentialoilfromthelemongrassbysteamdistillationwereasfollows：thematerial-liquidratioof1∶20，
5、Distillationtimeof160minandthemassconcentrationofNaClwas7g/L，thetotaloilyieldwas1.23%.Theextractionprocessofvolatileoilswasdividedintotwostagesconsideringthecolorchangeoftheoils.Thedistillationtimewasfirst20minand20～160min.Thecontentsofthemaincomponentsoftheoilswereobviouslydifferentintwofraction
6、s.The20～160minfractionshadgoodantioxidantactivitytorapeseedoilandhadsameantioxidantactivitywithBHTwhenusedwithVC.Butantioxidantactivityoflemongrassessentialoilinlardwaslow.TheDPPH·scavengingabilityof20～160minfractionswasworsethanBHTandBHA，buthadsametotalantioxidantactivitywiththem.Conclusion：Lemo
7、ngrassoilhadgoodantioxidantactivity，andcompoundsofhighboilingpointdemonstratedmoreantioxidantactivitythanlowones.Keywords：lemongrassessentialoil；edibleoil；antioxidantactivity；freeradicalscavengingpotential中圖分類(lèi)號(hào)：TS201.1
