Magnetic material for collecting magnetic particles and utilization thereof

Abstract

For collecting magnetic particles, there is used a magnetic material including a plurality of magnets that are arranged in contact one with another in parallel to a direction of magnetization in such a manner that south and north poles of adjacent magnets are reversed alternately or a magnetic material having at least one peak of a magnetic force in a magnetic pole surface, and the peak magnetic force is 600 gausses or more.

1 - 14 . (canceled) 
     
     
         15 . An apparatus comprising:
 a dispenser comprising a liquid suction line that sucks a liquid from a vessel and discharges the liquid; and   a magnetic material in the liquid suction line,   wherein the apparatus is configured to be controlled in such a manner that magnetic particles in the liquid sucked by the liquid suction line are adsorbed and held on an inner wall surface of the liquid suction line by a magnetic force of the magnetic material, and then the magnetic particles are made unaffected by the magnetic force of the magnetic material to release the magnetic particles from the liquid suction line and discharged together with the liquid to outside the liquid suction line, and wherein the magnetic material comprises a plurality of magnets that are arranged in contact with one another in parallel to a direction of magnetization in such a manner that south and north poles of adjacent magnets are reversed alternately.   
     
     
         16 . The apparatus according to  claim 15 , wherein the magnetic material has at least one peak of the magnetic force in a magnetic pole surface and the peak magnetic force is 600 gausses or more. 
     
     
         17 . The apparatus according to  claim 15 , the magnetic material comprises two or three of magnets. 
     
     
         18 . The apparatus according to  claim 15 , wherein the wall surface is an inner wall surface of a liquid suction line of a dispenser that sucks a liquid from a vessel and discharges the liquid. 
     
     
         19 . The apparatus according to  claim 15 , wherein the apparatus is an immunoassay apparatus. 
     
     
         20 . The apparatus according to  claim 16 , the magnetic material comprises two or three magnets. 
     
     
         21 . The apparatus according to  claim 16 , wherein the wall surface is an inner wall surface of a liquid suction line of a dispenser that sucks a liquid from a vessel and discharges the liquid. 
     
     
         22 . The apparatus according to  claim 16 , wherein the apparatus is an immunoassay apparatus.