Suen SY, Etzel MR. Sorption kinetics and breakthrough curves for pepsin and chymosin using pepstatin A affinity membranes.
J Chromatogr A 1994;
686:179-92. [PMID:
7881530 DOI:
10.1016/0021-9673(94)00701-2]
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Abstract
Isotherms and kinetic parameters for pepsin and chymosin sorption to immobilized pepstatin A were measured in batch experiments. The measured single-solute parameters were used in an affinity-membrane model which included competitive sorption kinetics, axial diffusion and dead volume mixing. The predictions made using the affinity-membrane model matched the experimental breakthrough curves, whereas predictions made using local-equilibrium theory were a distinct mismatch. The performance of affinity-membrane separations was dominated by slow sorption kinetics.
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