Patent ID: 7060173
Filing Date: 2006-06-13
Classification: A61L,B01D,C07K

Abstract:
1. A method for isolating from a fluid stream a selected compound from a biological contaminant comprising (a) directing a first fluid stream at a selected pH and comprising at least one biological contaminant and a selected compound to flow along a first non-isoelectric selective membrane; (b) directing a second fluid stream along the first non-isoelectric selective membrane so as to be isolated from the first fluid stream; (c) directing a third fluid stream so as to be separated from one of the first and the second fluid streams by a second non-isoelectric selective membrane, wherein the second non-isoelectric selective membrane has a preselected pore size that allows selective migration of the selected compound or the at least one biological contaminant present in at least one of the first and the second fluid streams through the second non-isoelectric selective membrane into the third fluid stream; (d) applying at least one voltage electric potential across at least one of the fluid streams, wherein at least a portion of either the selected compound or the at least one biological contaminant present in a fluid stream moves through a non-isoelectric selective membrane into a different fluid stream, wherein substantially all transmembrane migration of the selected compound and the at least one biological contaminant is initiated by the application of the at least one electric potential and (e) maintaining step (d) until at least one of the fluid streams contains a desired purity of the selected compound and a different fluid stream contains the at least one biological contaminant.