Ion-selective electrode device for polarographic measurement of oxygen

US4263115A · kind A · utility

Assignee

• Max-Planck-Gesellschaft zur Föderung der Wissenschaften e.V. · US

Inventors

• Manfred Kessler · Dortmund, DE
• Jens Hoper · Dortmund, DE

Key dates

• Filing date: Jul 3, 1978
• Grant date: Apr 21, 1981
• Expiry date: Jul 3, 1998

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N27/48
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An ion-selective electrode device for measuring oxygen concentrations comprises a noble metal reduction electrode connected to a voltage source; a reference electrode connected to said reduction electrode; an ion-selective carrier or ligand membrane disposed in front of the reduction electrode and containing a cation-selective ligand and being permeable to hydrogen ion; a closure membrane to seal the device against the outside atmosphere, the said closure membrane being permeable to oxygen and impermeable to water, and an electroyte containing the ligand cation of said ligand membrane, the said electrolyte being disposed between the said ligand membrane and said closure membrane.