Electrochemical determination of oxygen concentration

Details Electrochemical determination of oxygen concentration Electrochemical determination of oxygen concentration

1992-10-29

1994-12-27

Niebling, John

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

20415317, 2041531, G01N 2726

Patent

active

053762444

ABSTRACT:
In a process for electrochemically determining the oxygen concentration, in particular in body fluids, by means of an oxygen sensor having a sensor electrode, an exact oxygen determination is possible if a potential profile having a plurality of potential stages is impressed on the sensor electrode, the first potential stage being in the range between -0.5 and -1.2 V (1st measuring potential), the second potential stage being in the range between -0.5 and -1.3 V 2nd measuring potential) and the third potential stage being about 0 V, referred in all cases to an Ag/AgCl reference electrode, and there being between the two measuring potentials a potential difference of .gtoreq.50 mV, the length of stay at the two measurement potentials is in each case between 10 and 50 ms (measurement period), the current flowing at the two measuring potentials is determined and is integrated with respect to time, the integration starting in each case about 5 to 30 ms after the start of the measurement period and lasting in each case between 5 and 10 ms, and the oxygen concentration is determined by taking the difference between the two integrals.

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patent: 4578154 (1986-03-01), Kitamura et al.
patent: 4853091 (1989-08-01), Mund et al.
patent: 4891102 (1990-01-01), Albery et al.

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