An ion exchange chromatographic packing material is described that includes a copolymer grafted to support resin particles. The copolymer includes an ion exchange group, an ionic crosslinking group configured to ionically bind to the ion exchange group, and an adjustable ionization state group having at least a first net charge at the first pH and a second net charge at the second pH. An overall first net charge of the chromatographic packing material at the first pH is opposite in polarity to the overall second net charge of the chromatographic packing material. This allows impurities to be removed from the chromatographic packing material at the second pH.
本文描述了一种离子交换色谱填料,它包括一种接枝到支撑
树脂颗粒上的共聚物。共聚物包括离子交换基团、可与离子交换基团离子结合的离子交联基团和可调电离状态基团,可调电离状态基团在第一 pH 值时至少具有第一净电荷,在第二 pH 值时至少具有第二净电荷。色谱填料在第一 pH 值下的整体第一净电荷与色谱填料的整体第二净电荷极性相反。这样,杂质就能在第二 pH 值下从色谱填料中去除。