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Method and chemical sensor for determining concentrations of hydrogen peroxide and its precursor in a liquid

  • US 6,042,714 A
  • Filed: 12/04/1997
  • Issued: 03/28/2000
  • Est. Priority Date: 05/02/1997
  • Status: Expired due to Term
First Claim
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1. A chemical sensor for measuring a concentration of a H2 O2 precursor in a liquid, said H2 O2 precursor being a compound that can produce H2 O2 in said liquid under appropriate reaction conditions, which comprises a transducer which is able to conduct an electric current and a composition deposited on a surface of the transducer, wherein said composition comprises a catalyst for said H2 O2 production reaction and a mixed-valence compound having a formula as follows:

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    space="preserve" listing-type="equation">M.sub.y.sup.z+ [Fe(II)(CN).sub.6 ]wherein M is Co, Ni, Cr, Sc, V, Cu, Mn, Ag, Eu, Cd, Zn, Ru, or Rh;

    z is the valence of M;

    y=4/z; and

    the catalyst is an urea oxidase or a cholesterol oxidase.

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