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    • 6. 发明申请
    • Highly-sensitive magnetic marker for use in immunoreaction measurement
    • 用于免疫反应测量的高灵敏度磁标记
    • US20070037297A1
    • 2007-02-15
    • US11581936
    • 2006-10-17
    • Kohji YoshinagaKeiji Enpuku
    • Kohji YoshinagaKeiji Enpuku
    • G01N33/551H01F1/26
    • G01N33/5434G01N2446/84G01N2446/86
    • Disclosed are a highly-sensitive magnetic marker for use in measuring an immunoreaction with a SQUID magnetic sensor and the preparation thereof. The magnetic marker is composed of a magnetic fine particle and a polymer encapsulating the particle, wherein the particle diameter of the magnetic fine particle (preferably ferrite Fe3O4) is 20 to 40 nm and the external the diameter of the magnetic marker is 40 to 100 nm, the polymer having carboxyl groups on the surface thereof. The magnetic maker for a SQUID magnetic sensor is prepared by causing the surface of a magnetic fine particle to adsorb a hydrophilic macromonomer (preferably polyvinylpyrrolidone) having a polymerizable vinyl group at the terminal thereof and having a molecular weight of 500 to 1000, and then adding a monomer of a hydrophilic vinyl compound having carboxyl group and a crosslinking agent for carrying out copolymerization reaction.
    • 公开了用于测量与SQUID磁传感器的免疫反应及其制备的高灵敏度磁性标记。 磁性标记物由磁性微粒和包封颗粒的聚合物组成,其中磁性细颗粒(优选铁素体Fe 3 O 4 O 4)的粒径为20 至40nm,外部的磁性标记物的直径为40〜100nm,其表面具有羧基的聚合物。 通过使磁性细颗粒的表面在其末端吸附具有可聚合乙烯基的亲水性大分子单体(优选聚乙烯吡咯烷酮)并分子量为500至1000,然后加入 具有羧基的亲水性乙烯基化合物的单体和用于进行共聚反应的交联剂。