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Enzyme electrode provided with immobilized enzyme membrane

  • US 4,240,889 A
  • Filed: 01/24/1979
  • Issued: 12/23/1980
  • Est. Priority Date: 01/28/1978
  • Status: Expired due to Term
First Claim
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1. In an enzyme electrode useful for a polarographic determination of a slight amount of component in a test solution comprising an anode, a cathode, an immobilized enzyme membrane and an electrolyte, the improvement comprising an immobilized enzyme membrane consisting of a dense skin layer and a porous layer wherein the enzyme is immobilized onto the porous layer of the membrane, said skin layer having a selective hydrogen peroxide permeability, and said immobilized enzyme membrane being arranged so that the skin layer is an extended layer and is faced to the anode and the porous layer immobilized with the enzyme is in the position of contacting with the test solution.

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