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1、畢業(yè)論文題目:茶多糖提取工藝的優(yōu)化專業(yè):藥學(xué)方向:藥物化學(xué)目錄論文正文1中文摘要1英文摘眼1前言2實(shí)驗(yàn)部分3結(jié)果與分析6問題與討論13結(jié)論14參考文獻(xiàn)15致謝16課題任務(wù)書17外文翻譯21文獻(xiàn)綜述36開題報(bào)告43茶多糖提取工藝的優(yōu)化摘要目的:本文以粗茶為主要原材料進(jìn)行茶多糖提取工藝的研究。方法:采取水提醇沉法,對茶葉中的茶多糖進(jìn)行提取分離,然后運(yùn)用苯酚-硫酸法測定茶多糖的含量。本文重點(diǎn)以pH值對茶多糖提取率的影響進(jìn)行了探討,在單因素實(shí)驗(yàn)結(jié)果的基礎(chǔ)上,考察了pH值、浸提溫度、浸提時(shí)間以及乙醇濃度四因素對茶多糖提取率的影響,采取L9(3)4的正交實(shí)驗(yàn)設(shè)計(jì),通過極差分析,得到茶多糖提取的最佳條件組
2、合。結(jié)果:對茶多糖提取率影響最顯著的因素為浸提溫度,其次為乙醇濃度、浸提時(shí)間、pH值,茶多糖的最佳提取工藝條件為pH值為4、浸提溫度為85°C、浸提時(shí)間為1.5h、乙醇濃度為75%,茶葉中茶多糖的平均含量為2.67%。結(jié)論:采用上述浸提工藝,既可以節(jié)省提取工藝的成本,也可以提高提取工藝的效率,并能最終為粗茶的綜合利用提供社會(huì)經(jīng)濟(jì)效益的新途徑。關(guān)鍵詞茶多糖;提?。徽辉囼?yàn);最佳工藝條件;平均含量第5頁OptimizationTechnologicalExtractionofTeaPolysaccharideAbstractPurpose:Thistextisstudyingtheprepara
3、tionprocedureforextractingpolysaccharidebasedontheroughtea.Method:Toadoptwaterextractionalcoholprecipitationmethod,isolateandpurifythepolysaccharidefromthetea,andthenusephenol-sulfuricacidmethodtodeterminethecontentofTeapolysaccharide.Inthispaper,pHvalueworkonTeapolysaccharideextractionyieldisstudi
4、edonthekeypoint.Basedontheresultsofthesinglefactorexperiment,makeanon-the-spotinvestigationofthepHvalue、lixiviatingtemperature、lixiviatingtimeandtheethanolconcentrationfourfactorsworkingonTeapolysaccharideextractionyield,takeL9(3)4orthogonaldesign,throughanalysisofrange,optimumtechnologicalconditio
5、ncombinationforextractingTeapolysaccharideisobtained.Result:ThemostsignificantfactorsforextractingTeapolysaccharideislixiviatingtemperature,followedbytheethanolconcentration、lixiviatingtime、pHvalue,optimumtechnologicalconditioncombinationforextractingTeapolysaccharideispHvaluefor4、lixiviatingtemper
6、aturefor85°C、lixiviatingtimeof1.5h、ethanolconcentrationof75%,theaveragecontentofteapolysaccharideintheteais2.67%.Conclusion:Withtheaboveextractingtechnique,wecansavethecostoftheextractionprocess,canalsoimprovetheefficiencyofextractingtechnique,ultimatelywecanprovidenewwaysofcomprehensiveutilization
7、ofsocialandeconomicbenefitforthecrudetea.KeywordsTeapolysaccharide;extraction;orthogonaltest;Optimumtechnologicalcondition;Averagecontent第5頁1前言茶葉屬于雙子葉植物,中國人素有飲茶、品茶的傳統(tǒng)習(xí)慣,在飲用之余,近些年來不少學(xué)者對茶葉中的成分進(jìn)行研究,發(fā)現(xiàn)茶葉中存在多糖成分