Magnetically responsive particles and method of preparation

Details Magnetically responsive particles and method of preparation Magnetically responsive particles and method of preparation

G - Physics

01

N

167/44, 117/24.4

G01N 33/546 (2006.01) B03C 1/01 (2006.01) C12N 11/08 (2006.01) C12N 11/14 (2006.01) G01N 33/543 (2006.01) G01N 33/545 (2006.01) G01N 33/553 (2006.01)

Patent

CA 1314769

ABSTRACT The invention relates to a stable magnetically respon- sive, substantially remanence-free reagent carrier and to a method for manufacture of the same. The reagent carrier comprises an iron oxide colloidally dispersed in a smooth particulate polymeric matrix having preferentially a hydrated diameter of from about 0.5 to about 100 um. The reagent carrier is prepared by a process which includes incorporating iron salts by passive transport into substan- tially spherical, water-swellable polymeric matrices, con- verting in situ the iron salts so-incorporated into their respective iron oxides. Docket No. 2480-A

493449

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