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时间:2020-05-18
《槐米中芦丁超声法和碱溶酸沉法提取比较.doc》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、2011届 分类号: 单位代码:10452毕业论文槐米中芦丁超声法和碱溶酸沉法提取比较ComparationofUltrasonicandAlkalisolutionandacidprecipitationextractedRutinfromSophorajaponica·1摘要槐花中主要成分为芦丁,又名芸香苷,现在报道的提取方法有很多,本实验主要研究超声提取法与碱溶酸沉法,比较这两种方法提取率高低。超声法是用70%乙醇溶液浸泡槐米粉,在超声清洗器中进行超声处理30min,处理2次,收集滤液,用浓盐酸调节PH
2、值至3,静置,至沉淀完全后,抽滤,收集沉淀得到芦丁粗品,粗品在60-70℃水浴中溶解,煮沸15min,趁热抽滤,静置滤液,待沉淀完全,抽滤,沉淀在65℃干燥40min,得到芦丁的纯化物;碱溶酸沉法是用蒸馏水浸泡,加氧化钙1-1.5g,调节PH至8,加热至微沸,保持40min,趁热过滤,浸煮2次,收集滤液,用浓盐酸调节PH至5,静置至沉淀完全,将沉淀在60-70℃水浴中,溶解,煮沸15min,趁热抽滤,静置滤液,待沉淀完全,抽滤,沉淀在65℃干燥40min,得到芦丁的纯化物。本实验中碱溶酸沉法比超声法的提取率高。关键词:槐米;超声提取法;碱溶酸沉法;紫外分光
3、光度法;聚酰胺薄膜ABSTRACTThisexperimentcomparedultrasonicextractionwithalkalisolutionandacidprecipitationinextractionrateofrutin.UltrasonicmethodissoakedSophorajaponicawith70%ethanol,theultrasoniccleanercarriedouttheSophorajaponicawith30minutes.thenfilteringthesolutionandcarriedouttheresi
4、dueintheultrasoniccleaneragain.CollectingthefiltrateinbeakerandAdjustingthefilter’sPHto3withconcentratedhydrochloricacid.Standingthefilterandprecipitatingcompletely.Collectingtheprecipitatebythefiltration.Theprecipitateiscrudeextractrutin.Recrystallizatingthecrudeextractrutinin60-
5、70℃waterbathandboilingtherecrystallizate’ssolutiononelectricfurnacewith15minutes.Filtratingthesolutionwhenitisboilingandthefiltrateasideuntiltheprecipitatecompletely.Filtratingthesolution,Thencollectingtheprecipitate.Theprecipitatedriedat65℃inVacuumovenwith40minutes.Gettingthepuri
6、fiedrutin.AlkalisolutionandacidprecipitationissoakedSophorajaponicawithdistilledwater,Addingcalciumoxide1.5g.adjustingthePHto8,BoilingtheSolutionwith30minutes,thenfilteringthesolutionandcarriedouttheresidueagain,CollectingthefiltrateinbeakerandAdjustingthefilter’sPHto5withconcentr
7、atedhydrochloricacid.Standingthefilterandprecipitatingcompletely.Collectingtheprecipitatebythefiltration.Theprecipitateiscrudeextractrutin.Recrystallizatingthecrudeextractrutinin60-70℃waterbathandboilingtherecrystallizate’ssolutiononelectricfurnacewith15minutes.Filtratingthesoluti
8、onwhenitishotandthefiltrateasideu
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