The treatments to achieve the purity of the water in the laboratory, depends on the degree and the technical possibilities available, so it is important to take into account, that the differences in the quality of the water obtained, are due to the capacity of each of the processes to separate the dissolved substances or suspended elements present in the water to be purified.
According to this, the methods for each type of water are:
- Filtered water: the basis of filtration, is to pass a liquid through a filter medium to retain particles and suspended elements, and even retain bacteria and/or absorb certain dissolved gases or molecules, such as microfiltration or ultrafiltration, but normally pass gases, salts and dissolved substances, viruses and pyrogens.