1. The implementation standards are different
The pure water machine complies with "Specifications and Test Methods for Water Used in Analytical Laboratories (GB/T 6682-2008)", and the main parameters for determining water quality are TOC, heat source, electrical conductivity, etc. Household water purifiers comply with the "Hygienic Standard for Drinking Water (GB5749-2006)". The main parameters for determining water quality are color, turbidity, residual chlorine, TDS value, etc.
2. The working principles are different
A pure water machine utilizes reverse osmosis technology and ion exchange technology. Under the combined effect of various filter elements, control components, booster pumps, ultraviolet lamps, etc., it produces pure water and ultrapure water that meet the experimental requirements. Household water purifiers filter out harmful substances such as bacteria (0.4-1μm), viruses (0.4-0.02μm), and heavy metal ions through five-stage filter cores, and produce drinking water that meets the standards for raw consumption. Generally speaking, pure water and ultrapure water are purer than drinking water and have a lower electrical conductivity.
3. Different process flows
The purification system of the laboratory ultrapure water machine mainly consists of a pretreatment system, a reverse osmosis system and an ultrapure water system, and it belongs to ion-level filtration. The raw water passes through the pretreatment system to remove odors, large particles and most impurities. Then, through the reverse osmosis system, it undergoes purification and desalination treatment to obtain pure water. Finally, through the ultra-purification system, ultrapure water is produced. Household water purifiers typically have five levels of filter cores, namely PP cotton, granular activated carbon, precision compressed activated carbon, RO membrane/ultrafiltration membrane, and post-activated carbon, which belong to molecular-level filtration.
4. Different application fields
Laboratory pure water machines have long been standard equipment in laboratories of biology, electronics, pharmaceuticals, chemicals and other fields. The pure water and ultrapure water they produce are widely used in cell culture, mass spectrometry analysis, vessel cleaning, ultra-trace analysis, etc. Household water purifiers are quite common in daily life and can remove harmful substances. The purified water is slightly alkaline, sweet and refreshing, and can be drunk directly. The two cannot be used interchangeably: If one drinks pure water or ultrapure water produced by a laboratory pure water machine for a long time, it will cause a deficiency of trace elements in the human body and a decline in immunity. If the drinking water produced by a household water purifier is used for the experiment, the ions such as calcium, iron and magnesium in the water will also have a certain impact on the experimental results.
The differences between laboratory ultrapure water machines and household water purifiers are shared here for today. Hope it will be helpful to everyone!
