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System and method for manipulating magnetically responsive particles fluid samples to collect DNA or RNA from a sample

  • US 6,672,458 B2
  • Filed: 05/17/2001
  • Issued: 01/06/2004
  • Est. Priority Date: 05/19/2000
  • Status: Expired due to Term
First Claim
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1. A system for manipulating magnetically responsive particles having nucleic acid molecules bound thereto and being in a solution contained in at least one tube, said system comprising:

  • a tube receiver having at least one tube opening adapted to receive said tube therein;

    at least one first magnet;

    a magnet moving device, adapted to selectively move said first magnet between a first location with respect to said tube to attract said magnetically responsive particles toward an inner wall of said tube, and a second location with respect to said tube to allow said magnetically responsive particles to be suspended in said solution; and

    a second magnet, comprising an AC electromagnet, adapted to apply an AC magnetic field to said magnetically responsive particles when said first magnet is positioned at said second location, to remove a magnetization imposed on said magnetically responsive particles by said first magnet.

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