| 摘要 |
Novel magnetic assay methods and systems. According to a preferred embodimen t, a chromatographic medium, which preferably comprises a test strip, is provid ed that is designed to be contacted with a test solution having activated magnetic particles such that the solution flows bilaterally thereacross. A magnetic field, generated by a magnet or electromagnet, is selectively appli ed to the medium which causes the charged particles to become substantially bou nd at a site on the medium specified by the position of the magnet, to thus for m a captured line or zone. In one preferred embodiment, the magnetic field is applied at the site on the medium at which the test solution is contacted. T he degree of magnetic force applied to the membrane may be selectively adjusted to vary the width or surface area of the capture line or zone.
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