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KMID : 1059519950390110848
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Journal of the Korean Chemical Society
1995 Volume.39 No. 11 p.848 ~ p.855
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A Study on the Gravitational Effect Influencing Retention Behavior of Polymer in Thermal Field Flow Fractionation
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Ryoo Ki-Seok
Song Byoung-Su
Park Jong-Won
Min Byoung-Ryul
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Abstract
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The influence of gravitational effect on the retention behaviors of polystyrene (PS) and polymethylmethacrylate (PMMA) in flat type thermal field flow fractionation (Thermal FFF) was studied. In the case of downward flow of mobile phase, the gravitational effect acting in the same direction of mobile phase flow increases as the angle of the system from the horizontal line (0˚to 60˚) increases. The decreasement of retention time of PS & PMMA was found. Also, the increasement of dimensionless λ values was found. And the difference in the retention time of PS & PMMA having different molecular weight decreases and also the resolution decreases. In the case of upward flow of mobile phase, the gravitational effect acting in the opposite direction of mobile phase flow increases as the angle of the system from the horizontal line (0˚to 60˚) increases. The increasement of retention time of PS & PMMA was found. Also, the decreasement of dimensionless λ values was found. And the difference in the retention time of PS & PMMA having different molecular weight increases and also the resolution increases.
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