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物理化学学报  1993, Vol. 9 Issue (04): 516-522    DOI: 10.3866/PKU.WHXB19930417
研究论文     
螯合离子交换树脂的本征质子化常数
陶祖贻; 窦惠源; 王长守
兰州大学现代物理系,兰州 730000
Intrinsic Protonation Constants of Chelating ion Exchange Resin
Tao Zu-Yi; Dou Hui-Yuan; Wang Chang-Shou
Department of Modern Physics, Lanzhou University, Lanzhou , People's Republic of China 730000
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摘要: 在25 ℃, 分别在水及乙醇-水混合溶剂中, 用电位滴定法研究了国产的含有胺亚二乙酸功能基的大孔螯合树脂D751的质子化反应. 在对树脂相中各组分的活度系数不作任何假定的前提下, 用外推法从表观质子化常数的对数值与滴定度间的关系, 求得了该树脂的三级本征质子化常数. 本文肯定了表观质子化常数对滴定度的依赖性, 合理地解释了在不同溶剂中树脂的酸碱性的变化.
关键词: 螯合离子交换树脂表现质子化常数本征质子化常数水-乙醇混合溶剂    
Abstract: The intrinsic protonation constants of three steps of chelating ion exchange resin D751 containing iminodiacetic groups in water and ethanol-water mixtures have been deter-mined at 25 ℃ by potentoimetric titration and by means of the extrapolation procedure without the assumption on the activity coefficients of charged species in the resin phase. The changes in the acid-base properties of the chelating resin D751 in the water and the ethanol-water mixtures have been obse-rved, and the observed effects are explained. The variation of apparent protonation constants with the degree of neutralizaton has been demonstrated.
Key words: Chelating ion exchange resin    Apparent protonation constant    Intrinsic protonation conatant    Ethanol-water mixture solvent
收稿日期: 1992-01-22 出版日期: 1993-08-15
通讯作者: 陶祖贻   
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引用本文:

陶祖贻;窦惠源;王长守. 螯合离子交换树脂的本征质子化常数[J]. 物理化学学报, 1993, 9(04): 516-522, 10.3866/PKU.WHXB19930417

Tao Zu-Yi; Dou Hui-Yuan; Wang Chang-Shou. Intrinsic Protonation Constants of Chelating ion Exchange Resin. Acta Phys. -Chim. Sin., 1993, 9(04): 516-522, 10.3866/PKU.WHXB19930417.

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http://www.whxb.pku.edu.cn/CN/10.3866/PKU.WHXB19930417        http://www.whxb.pku.edu.cn/CN/Y1993/V9/I04/516

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