XL-LaF3-005 How to Choose Lanthanum Fluoride Lenses

 

Fluoride ion selective electrode is a sensor that uses lanthanum fluoride (LaF3) single crystal as the sensitive membrane. When the fluoride electrode is immersed in the test solution, the fluoride ions in the test solution diffuse into the membrane phase towards the surface of the fluoride electrode, and the fluoride ions in the membrane phase can also enter the solution, generating an interface potential. At the same time, due to the different concentrations of the solution on both sides of the electrode membrane, the diffusion rate of ions on the electrode surface into the solution is different, resulting in a diffusion potential within the LaF3 crystal membrane. The sum of these two potentials is the membrane potential of the electrode. Measure the potential difference (i.e. electromotive force) between the indicator electrode and the reference electrode, and then determine the activity of the measured component (measured concentration under certain conditions).