Method for detecting target compound
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United States of America Patent
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Aug 21, 2012
Grant Date -
Sep 27, 2007
app pub date -
Mar 21, 2007
filing date -
Mar 22, 2006
priority date (Note) -
Expired
status (Latency Note)
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Abstract
According to an aspect of the invention, there is provided a method for detecting a target compound including: injecting a test liquid containing a target compound into a colloid solution of magnetic nano-particles having an average particle diameter of 50 nm or less to allow the target compound to bind to the magnetic nano-particles, thereby forming bound magnetic nano-particles having a diameter of 100 nm or more; and bringing a dispersion liquid containing the bound magnetic nano-particles in proximity to a magnetic sensor including at least a magnetoresistive (MR) element and a permanent magnet while measuring the change in magnetic resistance to selectively detect the bound magnetic nano-particles, thereby indirectly detecting the target compound.
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