Apparatus for the electrochemical determination of the partial o

Details Apparatus for the electrochemical determination of the partial o Apparatus for the electrochemical determination of the partial o

1991-07-10

1993-07-06

Tung, T.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

20415316, 20415317, 204400, 204403, 204409, 204411, 204412, 204415, G01N 2726

Patent

active

052250636

ABSTRACT:
An apparatus for electrochemically determining the partial oxygen pressure pO.sub.2 in a liquid measuring medium includes a measuring sensor having a working electrode and a counter-electrode. The electrodes are manufactured in thin-film technology and are arranged on a substrate in a measuring channel, to which the measuring medium and a rinse medium can be supplied in alternation. The measuring channel connects a device which controls the flow rate of the measuring medium to a lumen of a double lumen catheter. The rinse medium is suppliable to a second lumen of the double lumen catheter with reversible flow direction. Both lumens have a common orifice which can be introduced into the measuring medium. So-called poisoning of the electrodes in this arrangement is suppressed because the electrodes are flooded in alternation by the measuring medium in a measuring phase and by the rinse medium in a regeneration phase.

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"Polarographic Determination of Oxygen In Biological Materials Kreuzer", et al., Medical and Biological Applications of Electrochemical Devices, Koryta Ed. 1980, pp. 173-187.

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