Assay utilizing magnetic particles
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United States of America Patent
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May 22, 2001
Grant Date -
N/A
app pub date -
Nov 19, 1999
filing date -
Apr 18, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An assay for the presence of an analyte or determining a biological or medical parameter comprising the steps of adding an assay component to a pH-sensitive material charged with magnetic particles, wherein the assay component causes a pH change which is a function of the analyte or parameter to be measured; subjecting the magnetic particles to an oscillating magnetic field; and measuring the effect of the magnetic field on the magnetic particles. The assay is an enzyme immunoassay. A kit for practicing the enzyme immunoassay is also described.
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