Sample analyzing device and sample analyzing method

摘要

This invention provides a sample analyzing device and sample analyzing method designed to suppress nonuniform capture of magnetic particles (10) and detect a desired substance with higher accuracy. The sample analyzing device includes a flow channel (15) that conducts thereinto a sample which contains the magnetic particles (10), and magnetic field generating means (12) that generates magnetic fields for capturing the magnetic particles (10) in a magnetic particles capturing region of the flow channel (15); wherein the flow channel has at least one of structural characteristics that a cross-sectional area of the flow channel, at a downstream end of the magnetic particles capturing region, is larger than a cross-sectional area of the flow channel, at an upstream end of the magnetic particles capturing region, and that the magnetic fields generated by the magnetic field generating means (12) have a greater magnitude at a downstream side of the magnetic particles capturing region than at an upstream side thereof.

主权项

1. A sample analyzing device comprising:
a flow channel, defined by flow channel walls, that conducts a sample including magnetic particles in a flow direction, at least a portion of the flow channel walls being formed from a transparent material; a magnet that generates magnetic fields for capturing the magnetic particles in a magnetic particles capturing region located within a transparent flow channel wall section adjacent to the magnet, the magnetic particles capturing region including an upstream side, a downstream side, a length parallel to the flow direction, and a width, perpendicular to the flow direction, that increases linearly from the upstream side to the downstream side, the magnet being disposed in an inclined condition with respect to the flow direction from the upstream side of the magnetic particles capturing region towards the downstream side, and the magnetic fields having a greater magnitude at the downstream side of the magnetic particles capturing region than at the upstream side; and a detector that detects light transmitted through the magnetic particles capturing region.