In laboratories it is required to use water with minimum impurities, since it is one of the most common substances and as a universal solvent, therefore, it is vital to take care of its quality. Water is composed of various properties, such as calcium, magnesium, iron, silica, manganese, chlorides, sulfates, sodium and other suspended materials. Several methods are used in water treatment, and their use depends on the objective pursued with the treated water.

However, in laboratories use water as a requirement of quality or purity, as a production and analysis method, where processes are established for its purification and systematic control is maintained to be used in the laboratory, avoiding interference or collateral reactions and to increase the reliability of these results.

According to this, to achieve the purification of water and be used in the laboratory, ideal equipment for such filtrations are used, such as the Water Purification System, which allows the chemical transformation of liquids in favor of the elaboration of studies with precise materials, as is the case of laboratory water.

Types of Water for the Laboratory

The different types of water are defined according to the physical and chemical parameters to be used in the laboratory, such as electrical conductivity, resistivity, carbon content, oxygen or silica where the types of water are presented according to their physicochemical characteristics, including:

• Type I: It is used for procedures that need maximum precision; such as atomic spectrometry, flame photometry, enzymology, blood gas, reference buffer solutions and reconstitution of freeze-dried materials used as standards. This should be chosen whenever a minimum level of ionized components is essential in the test or when solutions for metal tracking analysis are prepared.
• TYPE II: This must be prepared by distillation and free of organic impurities. It is recommended for laboratory analytical and general tests, such as hematological, serological and microbiological tests, in which it is specifically not indicated or has been proven that they require water of Type I quality.
• TYPE III: They are used for qualitative laboratory studies, such as uroanalysis, histological and parasitological procedures; for rinsing analytical samples; preparation of reference solutions; and for washing or rinsing glassware, with a maximum final conductivity of 5.0 µS/cm.

Water Purification Methods

Generally, there are different water qualities and different applications depending on their use. By means of water purification systems, directed towards the preparation of liquids, they are manufactured to eliminate impurities; the most important ones are:

• Filtration: it is the most natural method and is handled as pre-filtration to separate larger suspended particles. It is used to protect subsequent purification processes and prevent blocking of specialized machines.
• Ultrafiltration: it is a separation process based on a porous membrane with openings between 0.01 and 0.1 microns.
• Distillation: consists of separating components by boiling points, where compounds with a low vapor pressure, will have high boiling points and those with a high vapor pressure will have low boiling points.
• Reverse Osmosis: In this method pressure is applied on a water mostly concentrated in salts, passing through special semipermeable membranes, thus obtaining purified water.
• Deionization: This method is responsible for separating the minerals present in the water, by using ion exchange resins, which replace the minerals present by the protons of the resin.

In this sense, the water to be used in the laboratory, can not be achieved with a single step of purification, requires the mixture of more than one of them, to achieve the desired quality according to their physicochemical characteristics. As a complement, the use of equipment is required to preserve and increase its quality.

Water Purification Systems Brand Kalstein

It is important to have environmentally responsible equipment, which protects you from flammable products and substances, and our Water Purification Systems. They belong to the YR series, and have attractive features, such as: the optional tank with 25L purification resin can satisfy a higher water consumption, reducing the frequency of change of consumables. It has a recirculation function to always ensure a desirable pure water quality. UV technologies, microfiltration and easy disinfection ensure optimal bacteria purity of less than 1 CFU / ml.

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