Stripping solutions:

The different types of stripping agent solutions are:

i) Pure water or water adjusted to an appropriate pH or molarity of acid.

ii) Water containing an oxidizing or reducing agent.

iii) Water containing an appropriate masking agent.

The masking agent may help in achieving the selectivity by

i) Suppressing the extraction of the interfering cations altogether.

ii) By raising the pH ½ of the extraction of the interfering cations such that the metal of interest is quantitatively extracted before this pH.

iii) By slowing down the kinetics of extraction of the interfering cations.