For a solution (dilute solution) whose conductivity and temperature have a linear relationship within a certain range, the temperature coefficient of the solution can be obtained by measuring the conductivity value of the solution when the solution is 25.0 °C and t °C (not 25.0 °C). a.
Methods as below:
Using the automatic temperature compensation method, insert the electrode and temperature sensor into the liquid to be tested, and keep the temperature at 25.0°C. After the instrument is calibrated, the conductivity k25.0°C at this time is measured, and the temperature of the sample liquid is raised and controlled at tC ( Such as 30.0°C), after stabilization, adjust the temperature compensation coefficient so that the conductivity value at t°C measured by the instrument is equal to the value at 25.0°C (k25.0°C), and the temperature coefficient displayed at this time is the measured value The temperature coefficient of conductivity of a solution.
Note: The temperature control accuracy of the constant temperature Water Bath is temperature control accuracy: 0.1°C.
