Abstract
system in the range from -1400 to +1400 mV. The main absolute error of the measurements is equal tomV. The activity of ions is measured in the range from --14 to +14 with an error of 0.01 pX. The temperature compensation is done manually and automatically for temperatures of the solutions studied ranging from 0 to 100~ In the case of manual tem- perature compensation the temperature of the solution under study is established to within I~ It is possible to compensate for the drift in the conversion slope (the transfer factor) of the electrode system from 50 to 60 mV/pX for singly-charged ions and from 25 to 30 mV/pX for doubly-charged ions. The values of the temperature established with manual temperature compensation and the conversion slope are read directly from an indicator. With the use of a standard TKA-5 temperature compensator it is possible to determine the tempera- ture of the solution under study and to perform automatic temperature compensation of the emf of the electrode system. The process of making a measurement with an ion meter reduces to implementing Nernst's equation (i) pX=pXo:k (Ex--Eo) LS (t),
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