Tasks: 

Inductively Coupled Plasma Optical Emission spectroscopy (ICP-OES)

An analytical technique used to determine how much of certain elements are in a sample. The ICP-OES principle uses the fact that atoms and ions can absorb energy to move electrons from the ground state to an excited state. In ICP-OES, the source of that energy is heat from an argon plasma that operates at 10,000 kelvin.

The ICP-OES principle relies on those excited atoms releasing light at specific wavelengths as they transition to a lower energy level.

The volhard method

An indirect or back titration method in which an excess of a standard solution of silver nitrate is added to a chloride containing sample solution. The excess silver is then back titrated using a standardized solution of potassium or ammonium thiocyanate with ferric ion as an indicator.

Potentiometric titration 

This belongs to chemical methods of analysis in which the endpoint of the titration is monitored with an indicator electrode that records the change of the potential as a function of the amount (usually the volume) of the added titrant of exactly known concentration.