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Ion-selective electrode device for polarographic measurement of oxygen

  • US 4,263,115 A
  • Filed: 07/03/1978
  • Issued: 04/21/1981
  • Est. Priority Date: 07/03/1978
  • Status: Expired
First Claim
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1. An ion-selective electrode device for measuring oxygen concentrations comprisinga source of potential voltage;

  • a reduction electrode for the oxygen composed of a noble metal and connected to said voltage source;

    a reference electrode annularly disposed about said reduction electrode;

    a ligand membrane provided in front of the reduction electrode, the said ligand membrane containing a cation-selective carrier and being permeable to hydrogen ions;

    a closure membrane to seal the said electrodes against the outside space, the closure membrane being permeable to oxygen and impermeable to water, and an aqueous electrolyte containing the ligand cation of the said ligand membrane, the said electrolyte being disposed between said ligand membrane and said closure membrane.

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