Abstract
A unit is described for the automatic termination of coulometric or volumetric titrations in conjunction with a suitable valve millivoltmeter and motorized buret or constant current generator. Two values of potential can be preset on the instrument, in either rising or falling sequence. On reaching the first potential, the end-point is approached by pulsed addition of the titrant ; the titration is terminated at the second potential, The on and off time cycles for the pulsing circuit are independently variable from 0.1 to 1.0 sec on and 3 to 15 sec off.
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