响应面法优化辣椒籽油碱异构化制备共轭亚油酸工艺及其氧化稳定性-豆柴文库

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响应面法优化辣椒籽油碱异构化制备共轭亚油酸工艺及其氧化稳定性
Title:OptimizationofAlkaliIsomerizationProcessforthePreparationofConjugatedLinolenicAcidinChiliSeedOilandItsOxidationStability
Abstract:
Conjugatedlinolenicacid(CLnA)isavaluablebioactivefattyacidknownforitspotentialhealthbenefits.ThisstudyaimedtooptimizethealkaliisomerizationprocessforthepreparationofCLnAfromchiliseedoilandevaluateitsoxidationstability.Responsesurfacemethodology(RSM)wasemployedtodeterminetheoptimalprocessconditions,andthequalityandstabilityoftheresultingCLnAwereanalyzed.
Keywords:chiliseedoil,conjugatedlinolenicacid,alkaliisomerization,optimization,oxidationstability
1.Introduction
Conjugatedlinolenicacid(CLnA)isauniquefattyacidcharacterizedbyaconjugateddoublebondconfiguration.Ithasgainedincreasingattentionduetoitspotentialhealthbenefits,includinganti-inflammatory,anticancer,andlipid-loweringproperties.Chiliseedoil,richinlinoleicacid(LA),canbeusedasavaluablesourcefortheproductionofCLnAthroughalkaliisomerization.However,theoptimizationoftheprocessconditionsandtheevaluationoftheoxidationstabilityoftheobtainedCLnAareessentialforitsindustrialapplication.
2.MaterialsandMethods
2.1ChiliSeedOilExtractionandPurification
Chiliseedswerecollectedanddried,followedbyextractionwithasuitablesolvent.Theobtainedoilwasfurtherpurifiedusingarefiningprocesstoremoveimpuritiesandimprovethequalityforsubsequentreactions.
2.2AlkaliIsomerizationProcess
Thealkaliisomerizationprocesswascarriedoutusingchiliseedoilasthesubstrate.Acentralcompositedesign(CCD)oftheresponsesurfacemethodology(RSM)wasemployedtodeterminetheoptimalprocessconditions,includingreactiontemperature,reactiontime,andcatalystconcentration.TheconversionrateofLAtoCLnAwasusedastheresponsevariable.
2.3EvaluationofOxidationStability
TheoxidationstabilityoftheobtainedCLnAwasassessedusingvarioustechniques,includingperoxidevalue(PV),thiobarbituricacidreactivesubstances(TBARS),andantioxidantactivity.Thesamplesweresubjectedtoacceleratedoxidationconditionsandmonitoredforchangesinoxidativepara