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Preparation of Three Different Style Packed Capillary Frits
Ryoo, Jae-Jeong,Song, Young-Ae,Lee, Kwang-Pill,Park, Ji-Yeon,Choi, Seong-Ho,Hyun, Myung-Ho,Ohta, Kazutoku,Fujimoto, Chuzo,Jin, Ji-Ye,Takeuchi, Toyohide,Lee, Jung-Whan Korean Chemical Society 2006 Bulletin of the Korean Chemical Society Vol.27 No.4
Three different style capillary columns, a packed capillary with temporary quartz wool frit, a packed capillary with immobilized frit, and an immobilized packed-capillary, were easily prepared with a commercially available (S)-N-(3,5-dinitro-benzoyl)leucine-N-phenyl-N-alkylamide derived chiral stationary phase. Liquid chromatographic chiral separations of some racemic amino acid derivatives on these columns were performed and the results were compared to each other. The packed capillary with immobilized frit showed some merits in chiral chromatography.
Zhang, Yu-Ping,Noh, Hyun-Joo,Choi, Seong-Ho,Ryoo, Jae-Jeong,Lee, kwang-Pill,Ohta, Kazutoku,Fujimoto, Chuzo,Jin, Ji-Ye,Takeuchi, Toyohide Korean Chemical Society 2004 Bulletin of the Korean Chemical Society Vol.25 No.3
Chiral separation of aryalcohols such as 1-phenyl-propanol, 1-phenyl-2-proanol, and 2-phenyl-1-propanol by capillary electrophoresis has been optimized using the overlapping resolution mapping (ORM) scheme. Three critical parameters of the electrophoretic media, i.e. phosphate concentration, sulfated ${\beta}$-cyclodextrin (CD) concentration and pH, were chosen for optimization. The working ranges were initially presumed by 7 preexperiments. Further optimization was carried out by another seven experiments within the narrow working ranges. From the final overlapping resolution mapping all peak pairs, the area of maximum separations were located. Using the conditions of a point in this area, we found that the target compounds were a baseline separated within 30 min. The maximum separation conditions of arylalcohols were a chiral selector concentration of 5.4%, a phosphate concentration of 28 mM, and a pH of 5.0.