Acta Phys. -Chim. Sin. ›› 1993, Vol. 9 ›› Issue (04): 516-522.doi: 10.3866/PKU.WHXB19930417
• ARTICLE •
Tao Zu-Yi; Dou Hui-Yuan; Wang Chang-Shou
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.
Chelating ion exchange resin,
Apparent protonation constant,
Intrinsic protonation conatant,
Ethanol-water mixture solvent
Tao Zu-Yi; Dou Hui-Yuan; Wang Chang-Shou. Intrinsic Protonation Constants of Chelating ion Exchange Resin[J].Acta Phys. -Chim. Sin., 1993, 9(04): 516-522.
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