Purification

There are many purification methods in the laboratory, deionization, distillation, filtration reverse osmosis, and ultra-filtration. The experimental water purification equipment mainly includes distilled water and water purifier machine.

The water used in the laboratory must be purified water, so it is necessary to use a pure water machine to filter the floating matter in the water, heavy metals, bacteria, viruses, etc., and generally use multi-stage filter for water purification treatment. In the laboratory, there must be a laboratory water purifier.

The water distiller uses electric heating tap water to prepare pure water, and uses the principle that liquids vaporize on heat and liquefy on cold , to prepare distilled water. But the disadvantage is that the water contains more impurities.

The rotary evaporator is used for continuous distillation of volatile solvents under reduced pressure. As a heat source for distillation, it needs to be matched with a corresponding constant temperature water tank.