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时间:2020-08-17
《枸杞甜菜碱含量测定方法地比较研究.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、(中文标题:黑体,二号)枸杞甜菜碱含量测定方法的比较研究ComparativestudyonmethodsfordeterminationofbetainefromLyciumbarbarumL.(英文标题:TimesNewRoman,20)院系:生命科学学院专业:生物技术年级:2003级学号:姓名:马佳卉指导教师:自萍(黑体,三号)枸杞甜菜碱含量测定方法的比较研究(标题:黑体二号)摘要(黑体,小四):本实验利用甲醇加热回流提取枸杞甜菜碱,提取物经活性炭脱色、雷氏盐沉淀、分光光度法测定不同产地枸杞甜菜碱含量;或直接利用NH2柱未经衍生高效液相色谱法测定枸杞甜菜碱含量。通过比较分光光度法和高
2、效液相色谱法测定的枸杞甜菜碱含量,选择适宜的甜菜碱含量测定方法。由实验结果可知,NH2柱未经衍生高效液相色谱法快速、简便、重复性好,所测甜菜碱含量明显高于分光光度法。本研究表明NH2柱未经衍生高效液相色谱法能快速准确地测定枸杞甜菜碱含量,可用于枸杞的质量控制.(仿宋,小四,1.5倍行距)关键词:枸杞子;甜菜碱;分光光度法;高效液相色谱法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目录(黑体,三号)前言………………………………………………………………………………………41.材料与器材………………………………………………………
6、………………………51.1原料……………………………………………………………………………………51.2试剂……………………………………………………………………………………61.3仪器与设备……………………………………………………………………………62.实验方法………………………………………………………………………………62.1分光光度法测定枸杞甜菜碱含量……………………………………………………62.1.1实验原理……………………………………………………………………………62.1.2枸杞甜菜碱供试品溶液的制备……………………………………………………62.1.3甜菜碱标准曲线的建立………………
7、……………………………………………62.1.4供试品溶液的含量测定……………………………………………………………72.2高效液相色谱法测定枸杞甜菜碱含量………………………………………………72.2.1色谱分析条件………………………………………………………………………82.2.2枸杞甜菜碱供试品溶液的制备……………………………………………………82.2.3对照品溶液的制备…………………………………………………………………8
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