需要金幣： 1000 個金幣 |
資料包括：完整論文 |  |
 |
| 轉(zhuǎn)換比率：金額 X 10=金幣數(shù)量， 例100元=1000金幣 | 論文字數(shù)：5772 |  | |
| 折扣與優(yōu)惠：團購最低可5折優(yōu)惠 - 了解詳情 | 論文格式：Word格式(*.doc) |  |
摘 要:茶氨酸是茶葉中的一種特有的氨基酸，在醫(yī)藥、食品等領域具有廣泛的用途。本文綜述了目前茶氨酸的應用現(xiàn)狀及萃取方法，對微乳液膜萃取過程的研究現(xiàn)狀和意義進行了闡述；建立了微乳液膜萃取茶氨酸的新方法：研究了Na2CO3皂化HA/煤油微乳體系萃取茶氨酸的機理和工藝，考察了外水相PH值、P204濃度、乳水比、茶氨酸的初始濃度等對萃取效率的影響。結(jié)果表明，該微乳液萃取茶氨酸的最佳工藝條件為：油相中HA的濃度0.8mol/L、Na2CO3濃度3mol/L、茶氨酸濃度300mg/L、乳水比1:4、外水相PH值為3。該微乳液具有穩(wěn)定性好、無明顯溶脹和泄漏、萃取效率高、可自動破乳且油相可重復使用等優(yōu)點?！?/p> 關鍵詞：微乳液；二一（2-乙基己基）磷酸酯；P204/煤油；萃??；茶氨酸
ABSTRACT:Theanine is a peculiar amino acid in the tea.It possesses broad prospect in medicament,food industry and so on.In this paper,we summarized extraction method and the application situation of theanine,expond the recent research and significance of the extraction process.A new of extracting theanine by BLM was established in this paper,The mechanism and technique of extracting theanine were studied in HA/kerosene/Na2CO3 microemulsion system.The effect factors onextracting theanine from aqueous phase,including the pH value of theexternal phase;the concentration of P204;the volume ratio of microemulsion to external aqueous phase;theanine initial concentration were investigated.The results showed that the HA concent ration in the oil phase was 0.8mol/L,the concent ration of Na2CO3 was 3mol/L theanine initial concentration was 300mg/L;the volume ratio of microemulsion to external aqueous phase was 1:4,the pH value of the external aqueous phase was 3.0.The microemulsion system exhibited several advantages including good stability,low leakage and swelling,high efficiency of extraction,easy demulsification, and recoverable oil phase. Keywords:microemulsion;di-2-ethylhexyl phosphoric acid(HA);di(2-ethylhexyl) phosphoric acid/kerosene;extraction;Theanine |
