Add time:09/02/2019 Source:sciencedirect.com
The chromatographic behaviour of 29 aromatic amino acids (18 sulphonic, 9 carboxylic and 2 arsonic) on both cellulose and polystyrene-based anion and cation exchangers was studied. The influence of the protonation of the amino group on the selectivity of the polystyrene-based anion and cation exchangers towards such compounds was investigated, and the influence of the addition of ethanol to the aqueous eluent on the cation exchanger in the acid form was also studied.
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