Yang Bingcheng, Zhang Feifang, Liang Xinmiao
School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China.
Talanta. 2009 Jun 30;79(1):68-71. doi: 10.1016/j.talanta.2009.03.004. Epub 2009 Mar 14.
A simple potassium hydroxide electrodialytic generator (EDG) with singe membrane configuration is described. In this setup, one cation exchange resin (CER) bead is used to fabricate the EDG in place of the common membrane sheet. The device is implemented simply in a commercial stainless steel (SS) Tee which serves as both the EDG cartridge and the cathodic electrode. The present EDG has much lower internal volume (approximately 0.16(L), which is well suited with capillary ion chromatography system. The device has been tested up pressures to 3200 psi and could be directly deployed on the high-pressure side of the pump. The electrolysis gas can be effectively removed by a segment of PTFE tubing. In the tested range of 0-100mM, the KOH concentration is generated linearly with the applied current being near-Faradaic efficiency. The device permits both isocratic and gradient operation with good reproducibility, as demonstrated by the analysis of anions.
描述了一种具有单膜配置的简单氢氧化钾电渗析发生器（EDG）。在这种设置中，使用一个阳离子交换树脂（CER）珠代替普通的膜片来制造EDG。该装置简单地安装在一个商用不锈钢（SS）三通管中，该三通管既作为EDG盒又作为阴极电极。目前的EDG内部体积要小得多（约0.16升），非常适合毛细管离子色谱系统。该装置在高达3200 psi的压力下进行了测试，并且可以直接部署在泵的高压侧。电解气体可以通过一段聚四氟乙烯管有效地去除。在0-100mM的测试范围内，KOH浓度与施加电流呈线性关系，电流效率接近法拉第效率。如阴离子分析所示，该装置允许等度和梯度操作，且具有良好的重现性。
