Data processing of ion mobility measured by Hittorff method

Hittorff method is a method to determine ion migration number, which is mainly used to study the movement and migration law of ions in electrolyte solution. In the experiment, it is necessary to measure the change of current in electrolyte solution with time, and then calculate the migration number of ions. The specific steps of data processing are as follows:

Draw a current-time curve. Draw the current-time data obtained in the experiment into a graph and observe the changing trend of current.

Find the initial current and steady current. In the current-time curve, the initial current is the starting point of the current changing with time, and the steady current is the stable part of the current changing with time.

Calculate the migration number of ions. According to the formula of Hittorff method, the migration number of ions can be calculated, and the formula is: t+? =? (it/me)? ×? ( 1/F？ ×? C) testing, where t+ is the migration number of ions, the total current, I is the steady-state current, F is Faraday constant, and C is the concentration of electrolyte.

Calculation error and accuracy. Error analysis and precision evaluation are carried out on the obtained data to ensure the reliability and accuracy of the experimental results.

Statistics and analysis of data. The data obtained under different experimental conditions were statistically analyzed to explore the law of ion movement and migration.