Colloidal sized metal-polysaccharide particles

Details Colloidal sized metal-polysaccharide particles Colloidal sized metal-polysaccharide particles

B - Operations, Transporting

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6/63, 150/8, 530

B01J 20/04 (2006.01) B01D 15/00 (2006.01) B01D 15/08 (2006.01) B01J 20/32 (2006.01) G01N 33/548 (2006.01) G01N 33/553 (2006.01)

Patent

CA 1224003

ABSTRACT Colloidal sized particles comprising a metal particle coated with a water soluble polysaccharide derivative. The derivative is such that when it is not coating the metal, it has at least one, and preferably a number, of pendant functional groups each of which has a positive charge in aqueous solution. The metal is preferably selected from the group consisting of gold, platinum, and silver, whereas the polysaccharide may usefully be selected from the group consisting of dextran and mannan. The particles can be used as markers for biologically active molecules, or for separating different types of such molecules.

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