Study on Separation Mechanism of Ephedrine and Pseudoephedrine in Borax Buffer by Capillary Electrophoresis

被引:1
|
作者
Xu, Jinqiu [1 ]
Gong, Yinhua [2 ]
Huang, Rongrong [1 ]
Cai, Liangliang [1 ]
Ma, Xiaofei [1 ]
机构
[1] Nantong Univ, Affiliated Hosp, Dept Pharm, Nantong 226001, Peoples R China
[2] Soochow Univ, Affiliated Hosp 1, Dept Pharm, Suzhou 215006, Peoples R China
基金
中国国家自然科学基金;
关键词
Borax; ephedrine; pseudoephedrine; capillary electrophoresis; complexation; separation mechanism; CHIRAL SELECTOR; BASIC DRUGS; COMPLEXATION; ENANTIOSEPARATION; SILICA;
D O I
10.2174/0115734110270003231101115858
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Background: In borax buffer, ephedrine (EPH) and pseudoephedrine (PSE) can be well separated (Rs>10) in capillary electrophoresis (CE) without adding any other compounds, but the specific mechanism remains unclear.Methods: Titration analysis, nuclear magnetic resonance analysis, mass spectrum analysis and molecular modeling were used to investigate the separation mechanism.Results; Tetrahydroxy borate (a hydrolyzate of borax or boric acid) could react with ephedrine and pseudoephedrine to form self-assembled complexes, but the two complexes had different stabilities and electrophoretic mobilities resulting from the different steric configurations of analytes.Conclusion: The complexation based on borax was responsible for the separation.
引用
收藏
页码:685 / 692
页数:8
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