Advantages of dropping mercury electrode
1. The surface is updated periodically, and the analysis results are reproducible
2. The surface is small, the current density is large, and the polarization is easy
3. Most metal ions generate amalgam with Hg, which will not deposit on mercury drops, reducing
Lower the precipitation potential, so that most metal ions can be reduced on the mercury drop
4. The interference of H2 is small. The overpotential of H2 on the mercury dripping electrode is very high, and the precipitation potential is -1.5V.