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  • Title: Phenylalanine and arginine adsorption in zeolites X, Y, and Beta.
    Author: Krohn JE, Tsapatsis M.
    Journal: Langmuir; 2006 Oct 24; 22(22):9350-6. PubMed ID: 17042553.
    Abstract:
    This paper documents a continuation of work published in Langmuir 2005, 21, 8743-8750. We report new aspects of this amino acid adsorption study, including the effect of changing zeolite framework type and results from adsorption of mixed amino acids. In single-amino-acid adsorption experiments, zeolite Y (Si/Al=2.5) was found to adsorb no phenylalanine while admitting arginine to a similar extent as observed with zeolite beta. Using this zeolite Y, we measured mixed-amino-acid separation selectivities for arginine/phenylalanine as large as 25,000 or 2 orders of magnitude larger than the corresponding selectivities measured with zeolite beta.
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