Analysis principle

The analyzer collects electrode potential to determine the volume of standard titration solution at the endpoint, thereby determining the content of hydrochloric acid in the saline solution. Potentiometric titration is a method of determining the endpoint of titration by measuring changes in potential during the titration process. Compared with direct potentiometry, potentiometric titration does not require accurate measurement of electrode potential values. Therefore, the influence of temperature and liquid junction potential is not important, and its accuracy is better than direct potentiometry. Conventional titration relies on changes in indicator color to indicate the endpoint of titration. If the solution to be tested has color or turbidity, it is difficult to indicate the endpoint, or suitable indicators cannot be found at all. Potentiometric titration relies on the sudden jump of electrode potential to indicate the endpoint of titration. Before and after reaching the endpoint of titration, the concentration of the analyte in the droplet often changes continuously by n orders of magnitude, causing a sudden jump in potential. The content of the analyte is still calculated by the amount of titrant consumed. During the titration process, as the titrant is continuously added, the electrode potential E changes continuously. When the electrode potential suddenly jumps, it indicates that the titration has reached the endpoint. It is easier to determine the titration endpoint using a differential curve than a regular titration curve.

Product parameters (installed at the outlet of NaCl O3 decomposition tank)