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    • 19. 发明公开
    • METHOD FOR REPLACING LIQUID MEDIUM AND FLOW PATH DEVICE FOR SAID METHOD
    • EP3473317A1
    • 2019-04-24
    • EP17815366.4
    • 2017-06-19
    • Toppan Printing Co., Ltd.
    • ARAI Noriaki
    • B01D12/00B01J19/00B03C1/00C12M1/00G01N1/28G01N37/00
    • An objective of the present invention is to replace a liquid medium. A method and a flow channel device for the method are provided. The method includes: a step of forming a laminar flow of a plurality of laminar flow segments by at least two or more liquids, of a sample liquid and a second liquid medium, the sample liquid being a first liquid medium that contains dispersed object particles, and the laminar flow including at least a first laminar flow segment composed of at least the sample liquid, and a second laminar flow segment composed of the second liquid medium; a step of displacing the object particles from the first laminar flow segment to the second laminar flow segment by applying an external force to the laminar flow, the object particles having at least one physical characteristic of being allowed to displaced towards the second laminar flow segment from the first laminar flow segment by an external force; and a step of recovering a laminar flow fraction containing the object particles from the second laminar flow segment, the laminar flow fraction being recovered from a laminar flow fraction recovery surface perpendicular to the flow direction of the laminar flow, and the laminar flow fraction recovery surface being separated from the cross section of the first laminar flow segment.