Laboratory ultrapure water machine is a laboratory water purification equipment that removes all solid impurities, salt ions, bacteria and viruses from water through methods such as filtration, reverse osmosis, electrodialysis, ion exchangers, and ultraviolet sterilization.

Today, the editor will take you to learn how to choose the right laboratory ultrapure water machine:

1. Raw water quality

2. Water usage

3. Experimental content

There are two types of experiments: inorganic experiments and organic experiments. Inorganic experiments only require water with a resistance greater than 18 megaohms, while organic experiments usually require the removal of organic matter from the water. Therefore, in addition to a resistance greater than 18 megaohms, the indicator of total organic carbon is also needed. If it is a biological experiment, it is necessary to remove bacteria from the water.

You can choose an ultrapure water machine based on the type of instrument used. The resistance of liquid phase water is greater than 18 megaohms; And it is necessary to remove organic matter; Atomic absorption, atomic fluorescence, and environmental monitoring instruments require water consumption greater than 18 megaohms; PCR and other life science instruments require sterilization, removal of organic matter, and removal of heat sources in addition to a resistance greater than 18 megaohms when using water.

4. Water source

If the water used is qualified, the source of the pure water can also be informed to the laboratory ultrapure water machine manufacturer, and their technical personnel will recommend the corresponding specifications and models based on the situation.

The above three principles are based on practical application experience and can be referred to, but for accurate model selection, detailed water quality parameters such as resistance, trace elements, bacteria, and total organic carbon levels should be provided as much as possible.

5. Raw water quality

When purchasing an ultrapure water machine, it is necessary to provide the manufacturer with the water quality of the raw water, such as the presence of sediment, high hardness, groundwater, etc. The process of the ultrapure water machine is determined based on the quality of the raw water. If there is a lot of sediment, a pre-treatment device should be added, the hardness should be high, a softening device should be added, the salt content should be high, and a two-stage reverse osmosis process should be used. If choosing an ultrapure water machine that uses pure water as the water source, only the water quality requirements and water consumption need to be provided.