Chemical selectivity in micellar electrokinetic chromatography. II. Rationalization of elution patterns in different surfactant systems.
Chemical selectivity in micellar electrokinetic chromatography. II. Rationalization of elution patterns in different surfactant systems.
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胶束电动色谱中的化学选择性。
DOI：
10.1016/0021-9673(96)00080-5
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
Khaledi,MG
中科院分区：
文献类型：
--
作者：
Yang,S;Bumgarner,JG;Khaledi,MG
利用线性溶剂化能关系（LSERs）研究了胶束电动色谱（MEKC）中两个伪固定相的保留行为，一个由阳离子胶束十四烷基三甲基溴化铵（C14TAB）组成，另一个由阴离子三嵌段共聚物聚甲基丙烯酸甲酯-丙烯酸乙酯-甲基丙烯酸（Elvacite 2669）组成。发现溶质在这两种MEKC体系中的迁移行为主要受其si/e （V/100）和氢键受体（HBA）强度（β）的影响。溶质氢键供体（HBD）强度（α）对其在MEKC中的迁移影响较小。将这两种体系的特性与其他三种先前报道的阴离子胶束体系十二烷基硫酸钠（SDS）（阴离子碳氢化合物）、胆酸钠（SC）（阴离子胆汁盐）和全氟辛烷磺酸锂（LiPFOS）（阴离子氟碳化合物）进行了比较。结果表明，氢键相互作用是导致这5种MEKC体系具有不同化学选择性的主要原因。C14TAB胶束和Elvacite 2669离子聚合物都为溶质提供了氢键受体（HBA）位点，这与SC胶束相似。事实上，C14TAB是最强的HBA，而Elvacite 2669的HBA强度与SC胶束相似。另一方面，LiPFOS的氟碳胶束是最强的氢键供体（HBD）胶束，其次是弱HBD SDS胶束。总的来说，空穴形成对烃类表面活性剂MEKC体系（即SDS、SC和C14TAB）的化学选择性影响很小或没有影响。利用LSER分析得到的信息，对MEKC中不同类型的伪固定相的洗脱模式进行了合理化。
Retention behavior in micellar electrokinetic chromatography (MEKC) is investigated using linear solvation energy relationships (LSERs) for two pseudo-stationary phases, one consisting of cationic micelles of tetradecyltrimethylammonium bromide (C14TAB) and the other of an anionic triblock copolymer, poly(methyl methacrylate-ethyl acrylate-methacrylic acid) (Elvacite 2669). It was found that solutes' migration behaviors in these two MEKC systems are mainly influenced by their si/e (V/100) and hydrogen bonding acceptor (HBA) strength (β). However, solutes' hydrogen bonding donor (HBD) strength (α) has minor effects on their migration in MEKC. The characteristics of these two systems were compared to three other previously reported anionic micellar systems of sodium dodecyl sulfate (SDS) (anionic hydrocarbon), sodium cholate (SC) (anionic bile salt) and lithium perfluorooctane sulfonate (LiPFOS) (anionic fluorocarbon). It was concluded that hydrogen bonding interactions play a major role in providing different chemical selectivity among these five MEKC systems. Both C14TAB micelles and the ionic polymer of Elvacite 2669 provide hydrogen bonding acceptor (HBA) sites for solutes, which is similar to SC micelles. In fact, C14TAB is the strongest HBA, while Elvacite 2669 has HBA strength similar to that of SC micelles. On the other hand, the fluorocarbon micelles of LiPFOS are the strongest hydrogen bond donor (HBD) micelles, followed by the weak HBD SDS micelles. In general, cavity formation has little or no effect on chemical selectivity among hydrocarbon surfactant MEKC systems (i.e., SDS, SC and C14TAB). Information obtained from the LSER analysis is used to rationalize the elution patterns in MEKC with different types of pseudo-stationary phases.
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胶束电动色谱中的化学选择性：溶质-胶束相互作用的表征，用于表面活性剂的分类。
影响因子：
7.4
作者：
Yang,S;Khaledi,MG
通讯作者：
Khaledi,MG
使用混合氟碳烃阴离子表面活性剂对小肽进行胶束电动色谱的选择性控制。
DOI：
10.1016/0021-9673(94)01027-c
发表时间：
1995
期刊：
Journal of chromatography. A
影响因子：
--
作者：
Ye,B;Hadjmohammadi,M;Khaledi,MG
通讯作者：
Khaledi,MG
电动色谱的新准固定相：高分子表面活性剂和蛋白质
影响因子：
1.8
作者：
S. Terabe;Hiroto Ozaki;Yoshihide Tanaka
通讯作者：
Yoshihide Tanaka
用于胶束电动毛细管色谱的单分子准固定相
DOI：
10.1002/jhrc.1240151111
发表时间：
1992
期刊：
Hrc-journal of High Resolution Chromatography
影响因子：
--
作者：
C. Palmer;M. Khaled;H. Mcnair
通讯作者：
H. Mcnair
环糊精修饰胶束电动色谱法分离皮质类固醇和芳香烃
DOI：
10.1080/01483919108049298
发表时间：
1991
影响因子：
1.3
作者：
H. Nishi;M. Matsuo
通讯作者：
M. Matsuo