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无水体系中环氧氯丙烷活化琼脂糖凝胶制备高载量固定化金属亲和层析介质
Authors
丁锐
张松平
王平
苏志国
Publication date
1 January 2010
Publisher
Abstract
在以二甲基亚砜为溶剂的无水体系中,利用环氧氯丙烷对琼脂糖凝胶Sepharose6FastFlow进行活化,并偶联亚氨基二乙酸和Cu2+制备了固定化金属亲和层析介质.结果表明,该体系中环氧氯丙烷对琼脂糖凝胶的活化效率大幅度提高,在40%(φ)环氧氯丙烷、0.02g/mLNaOH及50℃、反应时间4h的优化条件下,环氧基活化密度最高达165μmol/mL,较目前报道的最高值提高50%以上.最终所制介质的Cu2+螯合密度为128.3μmol/mL,对BSA的平衡吸附容量达2.05mmol/L.以0.5mol/L咪唑为洗脱剂,被吸附的BSA洗脱率可达90%以上
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Last time updated on 09/11/2016