End point drift correction in automatic titration

Details End point drift correction in automatic titration End point drift correction in automatic titration

G - Physics

01

N

150/23, 324/27

G01N 27/44 (2006.01)

Patent

CA 1122504

Abstract of the Disclosure An apparatus and method are described for automatically correcting drift in automatic titrations, such as coulometric titrations of water. An end- point 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. The comparators are connected to current sources for controlling forward and back titration. At the end of a titration, the titration time and a signal representing the amount of the titrant used are stored in memory elements, and circuitry is provided including an array of gates for monitoring the signals from the comparators during two post titration time periods to deter- mine both the direction and rate of drift, and to correct the titration results for the amount of drift detected.

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