摘要
将离子液体三甲基羟乙基双三氟甲磺酰亚胺盐(HOEt N1,1,1NTf2)和羧甲基-β-环糊精(CM-β-CD)联用,建立了分离文拉法辛对映体的毛细管电泳法。在检测波长230 nm,高差10 cm,进样10 s的条件下,考察了CM-β-CD浓度、HOEt N1,1,1NTf2浓度、背景缓冲液浓度及其p H值、分离电压等实验条件对文拉法辛对映体拆分的影响。最佳分离条件为:在20 mmol·L-1p H 6.0磷酸盐缓冲液中添加30 mmol·L-1HOEt N1,1,1NTf2和4.5 mmol·L-1CM-β-CD,分离电压为20 k V。文拉法辛对映体在9 min内可实现基线分离,分离度为1.82。该法操作简便快速,分离效果好,适用于文拉法辛对映体的分离,同时也为其它手性药物的分离提供了参考。
A capillary electrophoresis method was established for the chiral separation of venlafaxine enantiomers, with trimethyl - hydroxyeth bis (trifluoromethylstdfonyl) imide ( HOEtN1, 1, 1NTf2 ) and carboxymethyl-β-cyclodextrin(CM-β-CD) as chiral selectors. Influences of CM-β-CD concentration, ionic liquid and buffer concentration, buffer pH value and separation voltage on chiral separation were investigated. The optimal enantioseparation conditions were as follows: background electrolyte(BGE) : 20 mmol · L^-1 Na2HPO4 - H3PO4 buffer(pH 6. 0) containing 30 mmol · L^-1 HOEtN1, 1, 1NTf2 and 4. 5 mmol· L^-1 CM-β-CD, applied voltage : 20 kV, detection wavelength : 230 nm, sampling time : 10 s. Under the optimal enantioseparation conditions, the baseline separation was achieved for venlafaxine enantiomers with resolution of 1.82 in 9 min. The method is of simple operation, fast analysis and good separation effect, which is proved to be suitable for the enantioseparation of venlafaxine. It could also provide a reference for the separation of other chiral drugs.
出处
《分析测试学报》
CAS
CSCD
北大核心
2015年第8期949-952,共4页
Journal of Instrumental Analysis
基金
国家自然科学基金资助项目(21102030)
关键词
离子液体
羧甲基-β-环糊精
毛细管电泳
对映体分离
文拉法辛
ionic liquids
carboxymethyl-β-cyclodextrin ( CM-β-CD )
capillary electrophoresis
enantiomer separation
venlafaxine