Endpoint drift correction for automatic titrations

Details Endpoint drift correction for automatic titrations Endpoint drift correction for automatic titrations

1978-05-30

1980-07-08

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

23230R, 204195T, 324425, 364497, 364500, 422 75, G01N 2744

Patent

active

042116147

ABSTRACT:
An apparatus and method are described for automatically correcting drift in automatic titrations, such as coulometric titrations of water. An endpoint detector provides a signal indicative of the state of the titration mixture and the detector signal is monitored by two comparators, responsive to titration mixture states on opposite sides of the endpoint and connected to means for controlling forward and back titration. At the end of a titration, the titration time and amount of titrant are stored in memory elements, and circuitry including an array of gates monitors the comparator signals during two post titration time periods to determine both the direction and rate of drift, and to correct the titration results for the amount of drift detected.

REFERENCES:
patent: 3305468 (1967-02-01), Liesch
patent: 3341430 (1967-09-01), Wickerham et al.
patent: 3726778 (1973-04-01), Levy et al.
patent: 3835008 (1974-09-01), Fisher et al.

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