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Citation: Tao Zu-Yi, Zhang Bao-Lin, Sheng Fen-Ling. Mechanism of Uptake of Amino Acid on ion Exchange Resin in Dilute Solutions[J]. Acta Physico-Chimica Sinica, ;1992, 8(04): 464-469. doi: 10.3866/PKU.WHXB19920408 shu

Mechanism of Uptake of Amino Acid on ion Exchange Resin in Dilute Solutions

1.
Department of Modern Physics; Centre of Analysis and Testing, Lanzhou University, Lanzhou 730000

Received Date: 20 March 1991
Available Online: 15 August 1992

The uptake of glycine by 001×7, a strong acid cation exchange resin and 201×7, a strong base anion exchange resin at low concentration as a function of the solution pH has been investigated in detail, The test of equivalence law for the uptake of glycine and the release of counter-ion from the ion exchange resin, and the in-frared spectroscopy of glycine adsorbed on the 001×7 resin were used to elucidere the mechanism of uptake of amino acid on ion exchange resin from aqueous solution. The uptake of glycine on styrene-divinybenzene copolymer has been examined too.
The uptakes of seven amino acids (Gly, Phe, Lys, Len, Ala, Thr, Glu) by the 001×7 resin in H form at low solution concentration as a function of pH have been determined too, and it was found that the maximum uptake of amino acids takes place in the pH range close to the isoelectric points, the heights of the maximum uptake of the neutral amino acids are related to the second macroscopic dissociation constants, and the height of the maximum uptake of phenylalanine is higher than that of glycine in 50%.
On the basis of experimental data it can be concluded that the uptake of amino acid by strong acid ...
- Amino acid; Ion exchange resin; Ion exchange; Ion transfer; Physical adsorption
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