In accordance with the present invention, an improved anion- exchange chromatographic composition has been formed which comprises synthetic resin support particles and anion exchange compounds attached thereto, wherein the anion-exchange compounds comprise an internal reactive group, which may be an ester, ketone or amide group, and a terminal quaternary ammonium salt which functions as an anion-exchange site. The compositions of the present invention exhibit improved hydrolytic stability as compared to other known anion-exchange chromatographic compositions due to the presence of linkers which increase the number of atoms separating the internal reactive group from the nitrogen atom of the terminal ammonium anion-exchange site. Formed articles and methods employing the anion-exchange chromatographic composition are also provided.
根据本发明,形成了一种改进的阴离子交换色谱组成物,其包括合成
树脂支撑粒子和附着于其上的阴离子交换化合物,其中阴离子交换化合物包括内部反应基团,可以是酯基、酮基或酰胺基团,以及终端季
铵盐,其作为阴离子交换位点。与其他已知的阴离子交换色谱组成物相比,本发明的组成物由于存在连接剂,可以增加内部反应基团与终端
铵阴离子交换位点的氮原子之间的原子数,因此表现出更好的
水解稳定性。本发明还提供了使用阴离子交换色谱组成物的形成物和方法。