Electrochemical ion chromatography using pretreated glassy carbon stationary phase

在这个项目中，我们开发了一种电化学版本的离子色谱，使用由微孔玻璃碳粉组成的导电固定相，通过电化学充电吸附离子物质。在固定相的正电位下，碱土金属离子和碱土金属离子的保留次数没有显著差异，但随着电位的降低，二价离子与固定相之间的库仑相互作用增强，二价离子的保留次数增加。负电位保留时间的增加导致二价离子和单价离子样品的分辨率提高。

In this project we have developed an electrochemical version of ion chromatography, using a conductive stationary phase consisting of microporous glassy carbon powder that adsorbs ionic substances by electrochemical charging. At positive potentials of the stationary phase there were no significant differences in retention between alkali and alkaline earth metal ions, but as the potential is decreased, the retention times of the divalent ions increased more because of stronger coulombic interactions between the divalent ions and stationary phase. The increases in the retention time at negative potentials resulted in the enhancement of resolution for di- and monovalent ion samples.