The deionisation process removes impurities from the water.

The deionisations in the laboratory are used to remove impurities from water.

The laboratory uses deionised water for experiments.

The laboratory technician deionised the water before conducting the experiment.

The water deionises during the purification process.

I need to deionise the water before using it in the experiment.

The technician is deionising the water to remove impurities.