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KMID : 0380019950100050482
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Korean Journal of Biotechnology and Bioengineering
1995 Volume.10 No. 5 p.482 ~ p.490
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Comparison of Axial and Radial Flow Chromatography on Protein Separation Speed and Resolution
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Abstract
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The relationship between pressure drop and liquid flow rate, for an axial and a radial flow chromatographic column packed with compressible porous media was theoretically analyzed using modified Kozeny-Carman equation. The results were compared with experimental observations obtained using compressible DEAE-agarose as a model medium. At 2-9 psi range studied, the theoretical derivation accounting for ´gel compression´ effect predicted simple Langmuirian type response of volumetric flow rate to changes in pressure drop. On the other hand, the experimental response was more or less sigmoidal. At the same pressure drop, radial column showed 2-3 times higher flow rates than those of axial column both theoretically and experimentally. Using r-HBsAg crude extract, protein resolution effects between the two types of columns at different flow rates were compared side-by-side. It turned out that, though general chromatographic behavior was very simila;axial column was somewhat superior in terms of rHBsAg recovery yield and specificity. Howeve;the number of theoretical plates analysis indicated the protein resolution effects were comparable.
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