Method for detecting source of error in an amperometric measurin

Details Method for detecting source of error in an amperometric measurin Method for detecting source of error in an amperometric measurin

1995-12-21

1997-03-18

Bell, Bruce F.

Electrolysis: processes, compositions used therein, and methods

Electrolytic analysis or testing

For corrosion

2057825, 205793, 204401, 204415, 204431, 204432, G01N 2726

Patent

active

056119097

ABSTRACT:
The invention is directed to a method for detecting error sources in an amperometric measuring cell 1 which includes at least a measuring electrode 2 and a counter electrode 3 within an electrolyte chamber 4 filled with an electrolyte solution 6. A permeable membrane 7 closes off the electrolyte chamber 4 with respect to the measuring sample. The method includes the steps of: providing a voltage source 10 outputting a voltage U to apply across the electrodes to generate a sensor current i(t) between the electrodes; starting with the voltage U across the electrodes at a reference voltage U.sub.0 with a reference current i.sub.0, increasing or decreasing the voltage U to a first voltage U.sub.1 during a first time span T.sub.1 ; shortly after the voltage U assumes the first voltage U.sub.1, measuring a first sensor current i.sub.1 and/or, toward the end of the first time span T.sub.1, measuring a second sensor current i.sub.2 ; and, comparing the sensor currents i.sub.1 and/or i.sub.2 to the reference current i.sub.0.

REFERENCES:
patent: 4500391 (1985-02-01), Schmidt et al.
patent: 4614577 (1986-09-01), Mund et al.
patent: 4961834 (1990-10-01), Kuhn et al.
patent: 5316648 (1994-05-01), Kuhn et al.

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