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Chemistry

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Chemistry

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Analytical Chemistry

Ion-Exchange Chromatography for Sample Cleanup

Description

Ion-exchange chromatography is a separation method that cleans up samples by using charge. A column is packed with an ion-exchange resin, which is a charged stationary phase on a solid support. Strong cation-exchange chromatography uses a negatively charged resin to separate cations. Strong anion-exchange chromatography uses...

Transcript

离子交换色谱法广泛用于分离和纯化带电化合物,尤其是大分子生物分子。

这种液相色谱技术使用填充有固定相微珠(称为树脂)的色谱柱,根据分析物与带电树脂之间的亲和力差异实现分离。

该技术主要有两种类型。在阳离子交换色谱中,使用带负电荷的树脂来结合带正电荷的分析物。类似地,在阴离子交换色谱中,带负电荷的分析物则与带正电荷的树脂结合。未结合的化合物被冲洗通过色谱柱,随后可将目标分析物收集到另一个容器中。

本视频将介绍离子交换色谱的基本原理,并通过在实验室中分离蛋白质混合物来演示该技术的操作过程。

固定相是实现成功分离的关键组分。强阳离子交换树脂通常含有强酸性功能基团,例如磺酸基团。弱阳离子交换树脂则含有弱酸性基团,例如羧酸基团。

同样,...

Tags

Cation Exchange ChromatographyAnion Exchange ChromatographyProtein SeparationSalt Gradient ElutionColumn EquilibrationBuffer pH SelectionHydroxyapatite ChromatographyImmobilized Metal Affinity ChromatographyHigh Performance Liquid Chromatography

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