Discrete-action titrimeters with automatic searching and registration of the points of equivalence

Conclusions

• 1. The functioning of a titrimeter with an automatic search and registration of the point of equivalence consists of three simultaneous processes, comprising the batching of the titrant, the observation of the measuring system's output, and the measurement of the total duration of batching intervals.

• 2. An analysis from the metrological point of view of the statistical characteristics of an automatic search and registration system reveals its duality consisting of the fact that the absence of reliable information on the system's position at a given moment entails the necessity of a transition beyond the point of equivalence (overtitration), thus contributing artificially a certain error ΔV_A. For a precise measurement the titration should be discontinued at the point of equivalence.

• 3. The relationships thus obtained can be used for computing the basic qualitative indexes of the titrimeter and for disclosing certain metrological features in calculating the total titration error in the presence of noise in the measuring system.