苦杏仁油微胶囊制备工艺优化及氧化稳定性研究韩金承,孟鑫*,吴慎威,闫伊狄(锦州医科大学食品与健康学院,辽宁锦州121000)摘要:以微胶囊包埋率为评价指标,采用响应面法优化苦杏仁油微胶囊制备工艺;同时为验证微胶囊化对油脂氧化稳定性的促进作用,以微胶囊化前后的苦杏仁油为对象,采用烘箱加速法进行加速氧化试验,每3d测定1次苦杏仁油和微胶囊中过氧化值、碘值、酸价、皂化值、共轭二烯烃值,并利用傅里叶红外光谱进行扫描鉴定其中的官能团。结果表明,苦杏仁油微胶囊制备的最佳工艺条件为:壁材料液比1∶16(g/mL),乳化剂添加量2.1%,芯壁比1∶85(g/mL),微胶囊平均包埋率为84.07%±0.37%,符合预测值。苦杏仁油在(60±1)℃的条件下储藏至第12天时,其过氧化值超过国标中的最低限量标准(0.25g/100g);而微胶囊化后的苦杏仁油在整个储藏期间各项指标的变化幅度较小,表明微胶囊化有利于提高油脂的氧化稳定性。该研究结果为开发油脂微胶囊化保存手段奠定了理论基础。关键词:苦杏仁油;微胶囊;氧化稳定性;傅里叶红外光谱;烘箱加速氧化StudyonPreparationProcessOptimizationandOxidationStabilityofBitterAlmondOilMicrocapsulesHANJin-cheng,MENGXin*,WUShen-wei,YANYi-di(CollegeofFoodandHealth,JinzhouMedicalUniversity,Jinzhou121000,China)Abstract:Responsesurfacemethodologywasusedtooptimizethepreparationprocessofbitteralmondoilmicrocapsulewithmicrocapsuleentrapmentrateasevaluationindex.Inordertoverifythepromotingeffectofmicroencapsulationontheoxidationstabilityofoil,theacceleratedoxidationtestofbitteralmondoilbeforeandaftermicroencapsulationwascarriedoutbyovenacceleratedmethod.Theperoxidevalue,iodinevalue,acidvalue,saponificationvalueandconjugateddieneinbitteralmondoilandmicrocapsulesweredeterminedevery3days,andthefunctionalgroupswereidentifiedbyFouriertransforminfraredspectroscopy.Theresultsshowedthattheoptimalprocessconditionsofbitteralmondoilmicrocapsuleswasasfollows:wallmaterialsolid-liquidratio1∶16(g/mL),emulsifierdosage2.1%,andcore-wallratio1∶85(g/mL).Theaverageentrapmentrateofmicrocapsuleswas84.07%±0.37%,whichwasinlinewiththepredictedvalue.Theperoxidevalueofbitteralmondoilexceededtheminimumstandardinthenationalstandard(0.2...