資源描述:
《枸杞甜菜堿含量測(cè)定方法地比較研究.doc》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫(kù)。
1、(中文標(biāo)題:黑體,二號(hào))枸杞甜菜堿含量測(cè)定方法的比較研究ComparativestudyonmethodsfordeterminationofbetainefromLyciumbarbarumL.(英文標(biāo)題:TimesNewRoman,20)院系:生命科學(xué)學(xué)院專業(yè):生物技術(shù)年級(jí):2003級(jí)學(xué)號(hào):姓名:馬佳卉指導(dǎo)教師:自萍(黑體,三號(hào))枸杞甜菜堿含量測(cè)定方法的比較研究(標(biāo)題:黑體二號(hào))摘要(黑體,小四):本實(shí)驗(yàn)利用甲醇加熱回流提取枸杞甜菜堿,提取物經(jīng)活性炭脫色、雷氏鹽沉淀、分光光度法測(cè)定不同產(chǎn)地枸杞甜菜堿含量;或直接利用NH2柱未經(jīng)衍生高效液相色譜法測(cè)定枸杞甜菜堿含量。通過(guò)比較分光光度法和高
2、效液相色譜法測(cè)定的枸杞甜菜堿含量,選擇適宜的甜菜堿含量測(cè)定方法。由實(shí)驗(yàn)結(jié)果可知,NH2柱未經(jīng)衍生高效液相色譜法快速、簡(jiǎn)便、重復(fù)性好,所測(cè)甜菜堿含量明顯高于分光光度法。本研究表明NH2柱未經(jīng)衍生高效液相色譜法能快速準(zhǔn)確地測(cè)定枸杞甜菜堿含量,可用于枸杞的質(zhì)量控制.(仿宋,小四,1.5倍行距)關(guān)鍵詞:枸杞子;甜菜堿;分光光度法;高效液相色譜法ComparativestudyonmethodsfordeterminationofbetainefromLyciumbarbarumL.(TimesNewRoman,18,加粗)Abstract(TimesNewRoman,14,加粗):Toapplym
3、ethanol-refluxedextractionmethodtoextractbetainefromLyciumbarbarumL.,extractionwasdecoloredbyactivecarbon,precipitatedwithRemeckesaltandthecontentsofbetainefromdifferentproducingareasweredeterminedbyspectrophotometry;andthecontentsofbetaineweredirectlydeterminedbyHPLCwithNH2stationaryphasewithoutd
4、erivatizationofbetaine.ThesuitabledeterminationmethodwasselectedthroughcomparingthemethodsofspectrophotometryandHPLCindeterminingthecontentofbetainefromLyciumbarbarumL.FromtheresultwecanseethatHPLCisrapid,accurate,andthecontentsofbetainedeterminedbyHPLCwerehigherthanspectrophotometry.Thisstudyshow
5、edthatHPLCwithNH2stationaryphasewithoutderivatizationofbetainecanbeappliedtodeterminethecontentofbetainefromLyciumbarbarumL.rapidlyandaccurately.(TimesNewRoman,12,1.5倍行距)Keywords:LyciumbarbarumL;betaine;spectrophotometry;HPLC目錄(黑體,三號(hào))前言………………………………………………………………………………………41.材料與器材………………………………………………………
6、………………………51.1原料……………………………………………………………………………………51.2試劑……………………………………………………………………………………61.3儀器與設(shè)備……………………………………………………………………………62.實(shí)驗(yàn)方法………………………………………………………………………………62.1分光光度法測(cè)定枸杞甜菜堿含量……………………………………………………62.1.1實(shí)驗(yàn)原理……………………………………………………………………………62.1.2枸杞甜菜堿供試品溶液的制備……………………………………………………62.1.3甜菜堿標(biāo)準(zhǔn)曲線的建立………………
7、……………………………………………62.1.4供試品溶液的含量測(cè)定……………………………………………………………72.2高效液相色譜法測(cè)定枸杞甜菜堿含量………………………………………………72.2.1色譜分析條件………………………………………………………………………82.2.2枸杞甜菜堿供試品溶液的制備……………………………………………………82.2.3對(duì)照品溶液的制備…………………………………………………………………8