Optimization of working conditions for polyelectrolyte sorbents |
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Authors: | E V Ivanaynen A V Pirogov O A Shpigun |
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Institution: | (1) Department of Chemistry, Aligarh Muslim University, Aligarh, 202002, UP, India; |
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Abstract: | Matters affecting the working stability of polyelectrolyte sorbents are considered. The decrease in retention time during
exploitation is found not to relate to desorption of the modifying polymer. It is found that dissociation of surface silanol
groups influences significantly the extra retention of ionene on the surface of silica-based sorbents. Sorption of heavy metals
and microbial contamination of the sorbent are identified as causes of decreased efficiency of polyectrolyte sorbents. The
influence of organic additives on the chromatography behavior of a number of inorganic anions is studied. Finally, exploitational
conditions for chromatography polyelectrolyte-containing columns are elaborated, allowing the initial parameters of separation
to be maintained for a period of 1.5 months or longer. |
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