Patent · US Expired

Method and apparatus for the electrochemical determination of oxygen concentration

US4853091A · kind A · utility

18Cited by

9References

15Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Konrad Mund
Walter Preidel · Erlangen, DE
J. Raghavendra Rao · Erlangen, DE
Gerhard Richter · Kreuztal, DE

Key dates

Filing date	Apr 26, 1988
Grant date	Aug 1, 1989
Priority date	—
Expiry date	Apr 26, 2008

Classification

Technology area (CPC G)Physics
CPC primaryG01N27/404
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The electrochemical determination of the oxygen concentration, particularly in biological matter, is possible by means of an oxygen sensor with a measuring electrode and a counter electrode over long periods of time, even if the sensor is implanted, by taking the following measures; two potentials are cyclically impressed on the measuring electrode, with one potential (measuring potential) in the range -1.4 V.ltoreq..rho.Ag/AgCl.ltoreq.-0.4 V, and the other potential (recovery potential) in the range -0.2 V.ltoreq..rho.Ag/AgCl.ltoreq.+0.2 V; the dwelling time at the measuring potential is small as compared to the duration of the cycle; and the current flowing during the measuring period is evaluated as the measuring signal.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.