Patent ID: 6723237
Filing Date: 2004-04-20
Classification: B03C,G01N,Y10T

Abstract:
A concentration device using magnetic particles comprising:magnetic particles to be suspended in a liquid, wherein the magnetic particles are capable of directly or indirectly capturing a target substance suspended in the liquid, a liquid suction passage in which liquid can pass through only in a suction direction; a liquid discharge passage in which liquid can pass through only in a discharge direction; magnetic force means operable to selectively exert or not exert a magnetic field from outside of at least one of the liquid suction passage and the liquid discharge passage on at least one of the liquid suction passage and the liquid discharge passage, and which can separate the magnetic particles by causing the magnetic particles to adhere to the inner wall of said at least one of the liquid suction passage and the liquid discharge passage; a storage section communicating with the liquid suction passage and the liquid discharge passage, for storing the sucked liquid; and pressure adjustment means for sucking and discharging the liquid by adjusting the pressure in the storage section, wherein said storage section is provided detachably with respect to said pressure adjustment means, and a liquid whose volume is larger than the maximum volume capable of being sucked into or discharged from the storage section at the time of one of suction or discharge, is continually passed through the storage section so that the magnetic particles are separated.