Electronic system for providing specificity in an electrochemica

Details Electronic system for providing specificity in an electrochemica Electronic system for providing specificity in an electrochemica

1976-05-24

1977-09-13

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

Vacuum arc discharge coating

204 1T, 204195H, 324 29, G01N 2748

Patent

active

040480410

ABSTRACT:
An electronic circuit is used to continuously determine the nitroglycerin ncentration in a sample solution of an electrochemical monitoring cell by controlling the applied potential to a cathode electrode of a three element cell. The cathode of the electrochemical cell is maintained at a desired potential by supplying a square wave modulated negative potential signal thereto and then measuring the difference in cell current between the cathode and anode elements at the start and finish of the pulse signal with a demodulator. Current from any additional reactions that are constant or that occur above a desired reduction potential within the electrochemical cell are automatically cancelled by a gating circuit which is electrically coupled to the demodulator.

REFERENCES:
patent: 3420764 (1969-01-01), Schlein
patent: 3922205 (1975-11-01), McLean et al.

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