Protein adsorption in two-dimensional electrochromatography packed with superporous and microporous cellulose beads
Protein adsorption in two-dimensional electrochromatography packed with superporous and microporous cellulose beads
Dongmei WANG1,2, Guodong JIA1, Liang XU1, Xiaoyan DONG1, Yan SUN1()
1. Department of Biochemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China; 2. School of Pharmaceutical Sciences, Tianjin Medical University, Tianjin 300070, China
Anion-exchange superporous cellulose (DEAE-SC) and microporous cellulose (DEAE-MC) adsorbents were packed in an electrochromatographic column, and the effect of external electric field (eEF) on the dynamic adsorption was investigated. The column was designed to provide longitudinal, transverse or 2-dimensional (2D) eEF. It was found that the electro-kinetic effect caused by the introduction of an electric field played an important role in the dynamic adsorption of bovine serum albumin to the adsorbents. The dynamic binding capacity (DBC) in the presence of 2D eEF was higher than in the presence of a one-dimensional eEF. The effect of flow velocity on the DBC of the two adsorbents was also demonstrated. It was found that the effect of electric field on the DEAE-MC column was more remarkable than that on the DEAE-SC column at the same flow rate, whereas the DEAE-SC column showed higher DBC and adsorption efficiency (AE) than the DEAE-MC column. With increasing flow rate, the DEAE-SC column could still offer high DBC and AE in the presence of the 2D eEF. For example, a DBC of 21.4 mg/mL and an AE of 57.7% were obtained even at a flow rate as high as 900 cm/h. The results indicate that the 2D electrochromatography packed with the superporous cellulose adsorbent is promising for high-speed protein chromatography.
Corresponding Author(s):
SUN Yan,Email:ysun@tju.edu.cn
引用本文:
. Protein adsorption in two-dimensional electrochromatography packed with superporous and microporous cellulose beads[J]. Frontiers of Chemical Engineering in China, 2009, 3(3): 229-234.
Dongmei WANG, Guodong JIA, Liang XU, Xiaoyan DONG, Yan SUN. Protein adsorption in two-dimensional electrochromatography packed with superporous and microporous cellulose beads. Front Chem Eng Chin, 2009, 3(3): 229-234.
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