摘要
自行设计了双水相支撑液相膜微萃取装置,以聚四氟乙烯徽孔膜为支撑,以磷酸三丁酯为有机萃取相,紫外光谱法研究了咖啡因稀水溶液的双水相液萃取。发现咖啡因以分子形式通过磷酸三丁酯有机液膜萃取进入HCl溶液中,萃取动力学受浓度差和收集液相中的化学反应控制,萃取率与咖啡因浓度成反比。
The double aqueous phases liquid membrane microextraction equipment was self designed,with porous polytetrafluoroethylene(PTFE) microporous membrane as support and TBP (tributyl phosphate) as organic extract phase,the double aqueous phase liquid extraction of caffeine dilute aqueous solution was investigated by UV spectrometry.The caffeine moleculer entered into hydrochloric acid solution by TBP organic liquid membrane extraction,and the extraction dynamics was controlled by concentration difference caffeine and chemical reactions in the receiving liquid phase and extraction rate inversed to the concentration of caffeine.
出处
《光谱实验室》
CAS
CSCD
2012年第4期1970-1973,共4页
Chinese Journal of Spectroscopy Laboratory
基金
国家自然基金(20875063)
分析化学国家重点实验室项目(2006-06)
关键词
咖啡因
液膜微萃取
双水相
磷酸三丁酯
Caffeine
Liquid Membrane Microextraction
Double Water Phase
TributylPhosphate