Chelex 100螯合树脂的水解和H+Na+交换

Jukka Lehto, Airi Paajanen, Risto Harjula, Heikki Leinonen
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引用次数: 22

摘要

提供的Chelex 100螯合树脂(钠/氢混合比例为43% /57%)易于通过水中的水合氢离子交换水解。溶液体积与交换器重量比为10-4000时,与去离子水接触使钠离子进入浓度为0.05-1.5 mM的溶液中,使pH从6.1提高到8.7-10.0。除了钠和氢氧化物外,该交换剂还释放氯离子和碳酸盐离子。两种乙酸基团对水合氢离子的选择性差异很大,校正后的选择性系数分别为1.3 × 109和1.4 × 103。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Hydrolysis and H+Na+ exchange by Chelex 100 chelating resin

Chelex 100 chelating resin, as supplied (mixed sodium/hydrogen form 43% /57%), was found to be readily hydrolyzable through hydronium ion exchange from water. Contact with deionized water in solution volume to exchanger weight ratios of 10–4000 brought sodium ions into solution with concentrations of 0.05–1.5 mM and increased the pH from 6.1 to 8.7–10.0. In addition to sodium and hydroxide, the exchanger was found to release chloride and carbonate ions. The two acetate groups vary substantially in their selectivities to hydronium ions, the corrected selectivity coefficients being 1.3 × 109 and 1.4 × 103, respectively.

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