Method and chemical sensor for determining concentrations of hydrogen peroxide and its precusor in a solution
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United States of America Patent
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Issued Date -
Sep 1, 2005
app pub date -
Sep 24, 2004
filing date -
Feb 26, 2004
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Abandoned
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Abstract
A new electrochemical sensor for determining hydrogen peroxide concentration having a mixed-valence metal oxide of M.sub.xO.sub.y deposited on an electrode surface thereof is disclosed, wherein M is a transition metal and has two or more than two valences. M.sub.xO.sub.y, for example, is M.sub.3O.sub.4 where M is Mn, Fe, Co or Pb, Tb.sub.4O.sub.7 or Pr.sub.6O.sub.11. Further, this invention also discloses an electrochemical sensor for determining a concentration of a hydrogen peroxide precursor, wherein a catalyst is immobilized in the matrix or on the surface of the mixed-valence metal oxide on the electrode. In a typical biochemical system, the catalyst can be a glucose oxidase and blood glucose is catalyzed to form hydrogen peroxide, so that the concentration of blood glucose is determined.
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