Effect of Mobile Phase pH* on Chromatographic Behaviour in Chiral Ligand-Exchange Thin-Layer Chromatography (CLETLC) of Amino Acid Enantiomers

2006 ◽  
Vol 63 (3-4) ◽  
pp. 197-201 ◽  
Author(s):  
B. Polak ◽  
W. Gołkiewicz ◽  
T. Tuzimski
Keyword(s):  
Amino Acid ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Ligand Exchange ◽  
Mobile Phase ◽  
Chiral Ligand ◽  
Chromatographic Behaviour ◽  
Amino Acid Enantiomers ◽  
Layer Chromatography ◽  
Chiral Ligand Exchange

scholarly journals Separation of 9-Fluorenylmethyloxycarbonyl Amino Acid Derivatives in Micellar Systems of High-Performance Thin-Layer Chromatography and Pressurized Planar Electrochromatography

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Beata Polak ◽  
Adam Traczuk ◽  
Sylwia Misztal
Keyword(s):  
Amino Acid ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Mobile Phase ◽  
High Performance ◽  
Reversed Phase ◽  
Amino Acid Derivatives ◽  
Solute Retention ◽  
Micellar Systems ◽  
Layer Chromatography

AbstractThe problems with separation of amino acid mixtures in reversed-phase mode are the result of their hydrophilic nature. The derivatisation of the amino group of mentioned above solutes leads to their solution. For this purpose, 9-fluorenylmethoxycarbonyl chloroformate (f-moc-Cl) as the derivatisation reagent is often used. In our study, the separation of some f-moc- amino acid derivatives (alanine, phenylalanine, leucine, methionine, proline and tryptophan) with the use of micellar systems of reversed-phase high-performance thin-layer chromatography (HPTLC) and pressurized planar electrochromatography (PPEC) is investigated. The effect of surfactant concentration, its type (anionic, cationic and non-ionic) and mobile phase buffer pH on the discussed above solute migration distances are presented. Our work reveals that the increase of sodium dodecylsulphate concentration in the mobile phase has a different effect on solute retention in HPTLC and PPEC. Moreover, it also affects the order of solutes in both techniques. In PPEC, in contrast to the HPTLC technique, the mobile phase pH affects solute retention. The type of surfactant in the mobile phase also impacts solute retention and migration distances. A mobile phase containing SDS improves system efficiency in both techniques. Herein, such an effect is presented for the first time.

Assay of aromatic amino acid enantiomers in rice-brewed suspensions by chiral ligand-exchange CE

2007 ◽  
Vol 28 (22) ◽  
pp. 4150-4155 ◽  
Author(s):  
Li Qi ◽  
Meirong Liu ◽  
Zhenpeng Guo ◽  
Mingyi Xie ◽  
Changgui Qiu ◽  
...  
Keyword(s):  
Amino Acid ◽  
Ligand Exchange ◽  
Aromatic Amino Acid ◽  
Chiral Ligand ◽  
Amino Acid Enantiomers ◽  
Chiral Ligand Exchange

Separation of fudosteine on an achiral C18column by HPLC with chiral ligand-exchange selectors as mobile phase additives

2008 ◽  
Vol 20 (4) ◽  
pp. 585-594 ◽  
Author(s):  
J. Ma ◽  
J. Cao ◽  
M. J. Ding ◽  
L. H. Yuan ◽  
M. J. Zhai ◽  
...  
Keyword(s):  
Ligand Exchange ◽  
Mobile Phase ◽  
Chiral Ligand ◽  
Mobile Phase Additives ◽  
Chiral Ligand Exchange
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