| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnetic particle having excellent dispersion stability without causing sedimentation or secondary aggregation when the magnetic particle is dispersed in a dispersion medium, and is used for extraction, separation, refinement, and concentration of nucleic acids such as DNA, RNA, or the like, biomolecules such as an antibody, a virus, protein, or the like. SOLUTION: The magnetic particle includes at least a magnetic material and a particle with a surface thereof coated with silica. The magnetic particle is subjected to refining treatment in which processes of settling down the dispersed particle in the dispersion medium, and dispersing and settling it down again after the dispersion medium is replaced with water are repeated until the conductivity of supernatant liquid of the dispersion medium, in which the particle is settled down, becomes 300μS/cm or less. The magnetic particle is used for extraction, separation, refinement and concentration of biomolecules. COPYRIGHT: (C)2010,JPO&INPIT
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