Polarographic sensor

Details Polarographic sensor Polarographic sensor

1976-11-05

1978-03-07

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

Vacuum arc discharge coating

128 2E, 204 1T, 324 29, G01N 2746

Patent

active

040778614

ABSTRACT:
An apparatus and method for polarographically determining the amount of oxygen in a gaseous mixture containing interfering reducible gases such as nitrous oxide is disclosed. The invention has particular application to the determination of oxygen in nitrous oxide containing anesthetic gas mixtures. The oxygen content is determined by operating a special polarographic cell at about -0.6 volts, which is below the voltage at which nitrous oxide would be sensed polarographically. A special cathode is utilized in which the exposed cathode face is disposed near the periphery of a cathode support mounted centrally under the gas permeable membrane so that ion mobility is increased to decrease the internal resistance of the electrochemical cell. It is also found that at the low operating voltage the cathode tends to become passivated or inactive after use. In accordance with the invention the cathode is activated at turn-on by reversing polarity and applying a positive voltage pulse to the cell.

REFERENCES:
patent: 2805191 (1957-09-01), Hersch
patent: 2898282 (1959-08-01), Flook et al.
patent: 3334039 (1967-08-01), Vlasak
patent: 3503861 (1970-03-01), Volpe
patent: 3718563 (1973-02-01), Krull et al.
patent: 3838034 (1974-09-01), Groves

Affiliated with

Also associated with

Rating

Polarographic sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Polarographic sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polarographic sensor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2019301