Circuit arrangement for amperometric titration

Details Circuit arrangement for amperometric titration Circuit arrangement for amperometric titration

1980-02-14

1981-11-17

Tokar, Michael J.

Electricity: measuring and testing

Electrolyte properties

Using a ph determining device

G01N 2742

Patent

active

043014135

ABSTRACT:
A circuit arrangement is disclosed for determining the end point in an amperometric titration, in which the current between a working electrode and a counter electrode is measured as a function of the total volume of the titration agent added in volume units. The working electrode is operated with a constant polarization voltage with respect to a reference electrode and a closed-loop control is provided for holding the polarization voltage prescribed between the working electrode and the reference electrode at a constant. The prescribed rated value voltage is compared to the actual value voltage identified between the working electrode and the reference electrodes. The reference value voltage is prescribed with the assistance of a reference value generator, the actual value voltage is identified in a high resistance manner with the assistance of an impedance transformer and the reference value/actual value deviation is compensated by way of a summing integrator.

REFERENCES:
patent: 2994590 (1961-08-01), Brems
patent: 3131348 (1964-04-01), Taylor et al.
patent: 3186800 (1965-06-01), Strickler
patent: 3248309 (1966-04-01), Robinson

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