Analysis of the principle of action of pure water machine for biochemical analyzer
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The ion exchange method filters raw water with a spherical resin (ion exchange resin), and ions in the water are exchanged with ions fixed on the resin. Two common ion exchange methods are hard water softening and deionization. Hard water softening is primarily a pretreatment procedure that reduces the hardness of water before it is treated by reverse osmosis (RO). The spherical resin in the softening machine softens the water by exchanging two calcium ions with one calcium ion or magnesium ion.
The ion exchange resin exchanges cations with hydrogen ions and exchanges anions with hydroxide ions; the cation exchange resin made of sulfonic acid-containing styrene and divinylbenzene exchanges various cations encountered by hydrogen ion exchange (for example, Na+, Ca2+, Al3+). Similarly, an anion exchange resin made of styrene containing a quaternary ammonium salt exchanges various anions (such as Cl-) encountered by hydroxide ions. The hydrogen ions released from the cation exchange resin are combined with the hydroxide ions released from the anion exchange resin to form pure water.
The anion-cation exchange resins can be packaged separately in different ion exchange beds into so-called anion exchange beds and cation exchange beds. It is also possible to mix the cation exchange resin with the anion exchange resin and place them in the same ion exchange bed. In either form, when the resin exchanges with the charged impurities in the water for hydrogen ions and/or hydroxide ions on the resin, it must be "regenerated." The procedure for regeneration is the reverse of the purification procedure, using hydrogen ions and hydroxide ions for regeneration, and exchanging impurities attached to the ion exchange resin.
If the ion exchange method is combined with other purified water quality methods (such as reverse osmosis, filtration, and activated carbon adsorption), the ion exchange method will play a very important part in the entire purification system. The ion exchange method can effectively remove ions, but can not effectively remove most of the organic matter or microorganisms. Microorganisms can be attached to the resin and the resin can be used as a medium to allow the microorganisms to grow rapidly and generate a heat source. Therefore, it needs to be designed and used in conjunction with other purification methods.
Biochemical instrument water purifier introduction and selection
The less non-interfering elements that biochemical analyzers can measure when analyzing chemical element content, the better the need to wash the test article with ultrapure water for more efficient calibration. The pure water machine for biochemical analysis is an ultrapure water preparation instrument designed for automatic biochemical analyzers. The biochemical analysis uses a pure water machine according to the characteristics of the biochemical analyzer that requires a large amount of ultrapure water, and is generally designed to be 10 L/hr to 60 liters per hour.
Biochemical analysis The requirements for ultrapure water by pure water machine generally require ultra-pure water resistivity >10MΩ-cm.
The biochemical analysis type ultra-pure water machine has certain characteristics in its design:
* The water storage bucket adopts a closed non-pressure bucket, and the automatic biochemical analyzer can directly absorb water into the machine. * The water tanks are all large, 120-500 liters.
*The reverse osmosis membrane and purification package are larger than the ordinary ultrapure water. * Because the water supply is large, the replacement of consumables is fast. The biochemical analysis type ultrapure water machine usually considers the design of saving consumables.
* Biochemical analyzer is widely used in hospital laboratory. The working time of medical department has certain speciality. It requires convenient and quick replacement of consumables of biochemical analyzer, and timely delivery of after-sales service. These requirements make biochemical analytical ultrapure water machines easier to maintain and replace consumables.
* Biochemical analysis type ultra-pure water machine is usually floor-standing, increasing the space inside the machine to fill more consumables and reducing the frequency of consumable replacement.