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本科毕业论文
蝶豆花中花青素的提取及其稳定性研究
学生姓名：谢蕙遥
学号：202151889
专业：化学
指导教师：黄守磊
职称：助理研究员
SuihuaUniversityGraduationPaper
ExtractionandStabilityStudyofAnthocyaninsfromClitoriaternatea
NameXieHuiyao
Studentnumber202151889
MajorChemistry
SupervisorHuangShoulei
SuihuaUniversity
PAGEII
摘要
ADDINCNKISM.UserStyle
以干燥蝶豆花为原料，以乙醇为提取剂，在pH1.0和pH4.5的条件下，通过超声波辅助提取法优化花青素的提取工艺。结果显示超声波辅助提取法的最优参数组合为：固液比例1:30(g/mL)，提取温度50℃，超声处理时间20min，乙醇体积分数60%，其最大提取量可达到7.54（mg/g）。花青素的稳定性受pH、温度、光照的影响，在强酸性环境（pH≤3）下稳定性较高，反应1h后，保留率均超过90%，温度超过60℃时花青素加速降解，半衰期缩短，保留率降低；紫外光显著降低花青素保留率，避光条件下花青素保留率达到95%，紫外光照射1h后降低到32%。
关键词：蝶豆花花青素提取量；花青素提取效率；超声波辅助提取法；花青素稳定性调控
ADDINCNKISM.UserStyleAbstract
Theextractionprocessofanthocyaninwasoptimizedbyultrasonic-assistedextractionwithdriedbutterflybeanflowerasrawmaterialandethanolasextractantatpH1.0andpH4.5.Theresultsshowedthattheoptimumparametersofultrasonic-assistedextractionmethodwereasfollows:solid-liquidratio1:30(g/mL),extractiontemperature50℃,ultrasonictreatmenttime20minandethanolvolumefraction60%,andthemaximumextractionamountcouldreach7.54(mg/g).ThestabilityofanthocyaninsisaffectedbypH,temperatureandlight,anditishighinstrongacidicenvironment(pH≤3).After1hofreaction,theretentionrateisover90%.Whenthetemperatureexceeds60℃,thedegradationofanthocyaninsisaccelerated,thehalf-lifeisshortenedandtheretentionrateisreduced.Ultravioletlightsignificantlyreducedtheretentionrateofanthocyanins,whichreached95%undertheconditionofavoidinglight,anddecreasedto32%after1hofultravioletlightirradiation.
Keywords:extractionamountofanthocyaninfrombutterflybeanflower;extractionefficiencyofanthocyanins;ultrasonic-assisted