With the advancement of science and technology, people's understanding of various things in the natural world is moving toward microscopic and intrinsic direction. Many experiments, testing requirements for reagents or impurities in the culture environment have reached the ppb level, and some Even reaching the ppt level; as in the life science research process, it is very sensitive to many pollutants in the water, especially heavy metals and soluble organic matter; ultrapure water required in HPLC and so on. In view of this, a number of professional research organizations have established water quality standards. These organizations and standards are: National Standard of the People's Republic of China GB6682-92 "Water Specifications and Experimental Methods for Analytical Laboratories", National Standard of the People's Republic of China GB/T11446.1-1997 "Electronic Water Specifications and Experimental Methods", American Chemical Society Organization (ACS), American Society for Testing and Materials Testing (ASTM), International Committee for Clinical Trial Standards (NCCLS), American Pharmaceutical Association (USP). Here we first give a brief introduction to the main applications of pure water and ultrapure water:
1. Reverse osmosis pure water: 1 Final cleaning of laboratory utensils 2 Buffer, chemical reagent preparation water 3 Microbial culture medium preparation water 4 Hydrogen generator, indoor humidifier, high pressure disinfection pot with pure water 5 people or experimental animal drinking water Wait;
2, ultra-pure water: 1 mobile, plant cell culture water 2 various medical biochemical analyzers, analyzers, hemodialysis water 3 analytical reagents and drug allocation dilution water 4 physiological, pathological, toxicological experimental water 5 hospitals, medicine Preparation room and central laboratory with purified water and high purity water 6 atomic absorption spectrum water 7 test tube baby water 8 various high performance liquid chromatography, ion chromatography water 9 other various laboratory water and medical water.
At present, the most stable and convenient method for preparing pure water and ultrapure water is through a pure water/ultra pure water system. From the advent of the world's first ultrapure water system to the present, the design and production concept of ultrapure water system has been continuously improved around the "best water quality, the most stable water quality".
First, the best water quality
1. Common impurities in natural water include soluble inorganic substances, organic matter, particulate matter, microorganisms, soluble gases, and the like. The pure water/ultra-pure water system is to remove these impurities as thoroughly as possible.
2. The main processes for purifying water quality are currently used in the purification of water, distillation, reverse osmosis, ion exchange, filtration, adsorption, UV oxidation and so on. At the same time, we can divide the purification process of water into three major steps, pretreatment (production of pure water), ion exchange (which can produce 18.2MΩ-cm ultrapure water) and post-treatment (production of ultra-pure that meets special requirements). water). According to the water quality of the influent and the requirements for the quality of the effluent, determine the method and process used in each step.
3. The pretreatment mainly includes a pretreatment unit and a reverse osmosis (RO) unit. Since the pretreated water will be further purified by reverse osmosis, impurities that have an influence on the reverse osmosis membrane must be removed as much as possible; mainly including large particulate matter. , residual chlorine and calcium ion magnesium ions. It is to be noted here that different processing units must be provided in a targeted manner depending on the difference in the quality of the influent water. Most pure water meter manufacturers are not very good at helping customers solve this problem, which will lead to subsequent purification not achieving the desired results and shortening the life of the main components of the instrument such as reverse osmosis membrane.
The Heal Force ultra-pure water system solves this problem well. It designs and produces wire-wound filters, activated carbon adsorption filters and softening resins to specifically remove large particulate matter, residual chlorine and calcium ions from water. Magnesium ions for optimum pretreatment.
Reverse osmosis is the use of a high pressure pump to provide a high pressure solution with a pressure greater than the osmotic pressure difference, water molecules will be forced through the semipermeable membrane to the low concentration side, reverse osmosis can filter out 90%-99% including inorganic ions Most of the pollutants inside, because of its superior purification efficiency, reverse osmosis is a very effective technology for water purification systems, because reverse osmosis can remove most of the dirt, so it is often used as a front-line treatment. It can significantly extend the use time of the deionization column. Since reverse osmosis is critical in the purification process of water and the replacement price of reverse osmosis membrane is high, we recommend that users choose an ultrapure water system that has a protective function against reverse osmosis membranes.
In order to maximize the service life of the reverse osmosis membrane and improve the filtration efficiency of the reverse osmosis membrane, the Heal Force ultrapure water system uses advanced and unique technology combined with the leading reverse osmosis current limiting design to limit the flow at the effluent. The valve allows the reverse osmosis membrane to be immersed in the water at all times without affecting the life due to drying. Extending the life of the reverse osmosis membrane is to ensure the quality of the effluent water, and also to improve the cost performance of the ultrapure water system.
4. Ion exchange ion exchange means that the positive ions in the water exchange with the H+ ions in the ion exchange resin, and the negative ions in the water exchange with the OH- ions on the ion exchange resin to achieve the purpose of purifying the water. By removing ions by ion exchange, it is theoretically possible to remove almost all of the ionic species, and at 25 ° C, the effluent resistivity reaches 18.2 MΩ-cm. The quality of the ion exchange effluent water depends mainly on the quality of the ion exchange resin and the exchange efficiency of water and resin in the exchange column.
The ion exchange resin on the market is mixed and the quality is uneven, which is difficult for users to distinguish. Therefore, we recommend that users pay attention to the brand of resin. The Heal Force ultrapure water system uses the world's highest quality ion exchange resin, combined with Heal Force's unique internal pressure column design to ensure that the resin is in full contact with water, significantly improving the exchange efficiency of the ion exchange column. Ability to the limit.
It should be noted here that the ion exchange method can effectively remove ions, but can not effectively remove most of the organic matter or microorganisms, and the microorganisms can be attached to the resin, and the resin is used as a medium, so that the microorganisms can rapidly grow and generate a heat source. Therefore, it needs to be designed and used in conjunction with other purification methods, which is the post-processing part we will discuss below.
5. The post-treatment mainly produces ultra-pure water with low organic matter type and low heat source type according to the special requirements of customers. There are various treatment methods for different requirements, such as ultrafiltration filtration method for removing heat source, dual-wavelength ultraviolet oxidation method for reducing total organic carbon (TOC) in water, and microfiltration to remove bacteria.
Ultrafiltration (UF) film is a molecular sieve, which is based on the size of the solution, allowing the solution to pass through a very fine filter to achieve the purpose of separating molecules of different sizes in the solution. The heat source content in ultrapure water can be reduced to 0.001 EU. /ml below. The dual-wavelength ultraviolet oxidation method can utilize photooxidation of organic compounds to reduce the total organic carbon concentration in ultrapure water to below 5 ppb.
Second, the most stable water ultra-pure water system can produce high-quality ultra-pure water is only the first step, for users to use, as long as possible to maintain high water quality as long as possible is the user's most concerned. At present, most manufacturers emphasize the attention to the use of details, often replace the consumables, and there are not many improvements from their own.
The Heal Force ultra-pure water system is completely different. It has some common functions, such as automatic setting of any time setting, standby 2 hours and various time-breaking sterilization and disinfection modes (using hydrogen peroxide as the hydrogen peroxide). Disinfectant liquid disinfection method, better protection of operators and filter columns, while ensuring the quality of ultrapure water), automatic shutdown of water cut, pure water / ultra pure water dual flow path design, etc., and a unique configuration to ensure stable water quality : Two-stage ion exchange and each stage consists of two columns, which can reduce the organic load of the UV lamp, further improve the water quality and extend the service life of the accessories. At the same time, Heal Force ultra-pure water system has up to 4 ultra-small, high-precision, 1/0.01 constant resistivity sensors, which accurately monitor the conductivity or resistivity of each pure water, and automatically compensate for temperature. TOC measurement is available for selection, resistivity, and TOC real-time detection. Through these high-precision sensors, the ultrapure water system is equipped with automatic discrimination or prompting pretreatment column, reverse osmosis membrane, primary purification column, multi-function purification column, microfiltration, ultrafiltration, UV lamp, etc. to ensure the machine It is in the best running condition to ensure the quality of water production.
Heal Force pure water / ultra pure water system
1. Reverse osmosis pure water: 1 Final cleaning of laboratory utensils 2 Buffer, chemical reagent preparation water 3 Microbial culture medium preparation water 4 Hydrogen generator, indoor humidifier, high pressure disinfection pot with pure water 5 people or experimental animal drinking water Wait;
2, ultra-pure water: 1 mobile, plant cell culture water 2 various medical biochemical analyzers, analyzers, hemodialysis water 3 analytical reagents and drug allocation dilution water 4 physiological, pathological, toxicological experimental water 5 hospitals, medicine Preparation room and central laboratory with purified water and high purity water 6 atomic absorption spectrum water 7 test tube baby water 8 various high performance liquid chromatography, ion chromatography water 9 other various laboratory water and medical water.
At present, the most stable and convenient method for preparing pure water and ultrapure water is through a pure water/ultra pure water system. From the advent of the world's first ultrapure water system to the present, the design and production concept of ultrapure water system has been continuously improved around the "best water quality, the most stable water quality".
First, the best water quality
1. Common impurities in natural water include soluble inorganic substances, organic matter, particulate matter, microorganisms, soluble gases, and the like. The pure water/ultra-pure water system is to remove these impurities as thoroughly as possible.
2. The main processes for purifying water quality are currently used in the purification of water, distillation, reverse osmosis, ion exchange, filtration, adsorption, UV oxidation and so on. At the same time, we can divide the purification process of water into three major steps, pretreatment (production of pure water), ion exchange (which can produce 18.2MΩ-cm ultrapure water) and post-treatment (production of ultra-pure that meets special requirements). water). According to the water quality of the influent and the requirements for the quality of the effluent, determine the method and process used in each step.
3. The pretreatment mainly includes a pretreatment unit and a reverse osmosis (RO) unit. Since the pretreated water will be further purified by reverse osmosis, impurities that have an influence on the reverse osmosis membrane must be removed as much as possible; mainly including large particulate matter. , residual chlorine and calcium ion magnesium ions. It is to be noted here that different processing units must be provided in a targeted manner depending on the difference in the quality of the influent water. Most pure water meter manufacturers are not very good at helping customers solve this problem, which will lead to subsequent purification not achieving the desired results and shortening the life of the main components of the instrument such as reverse osmosis membrane.
The Heal Force ultra-pure water system solves this problem well. It designs and produces wire-wound filters, activated carbon adsorption filters and softening resins to specifically remove large particulate matter, residual chlorine and calcium ions from water. Magnesium ions for optimum pretreatment.
Reverse osmosis is the use of a high pressure pump to provide a high pressure solution with a pressure greater than the osmotic pressure difference, water molecules will be forced through the semipermeable membrane to the low concentration side, reverse osmosis can filter out 90%-99% including inorganic ions Most of the pollutants inside, because of its superior purification efficiency, reverse osmosis is a very effective technology for water purification systems, because reverse osmosis can remove most of the dirt, so it is often used as a front-line treatment. It can significantly extend the use time of the deionization column. Since reverse osmosis is critical in the purification process of water and the replacement price of reverse osmosis membrane is high, we recommend that users choose an ultrapure water system that has a protective function against reverse osmosis membranes.
In order to maximize the service life of the reverse osmosis membrane and improve the filtration efficiency of the reverse osmosis membrane, the Heal Force ultrapure water system uses advanced and unique technology combined with the leading reverse osmosis current limiting design to limit the flow at the effluent. The valve allows the reverse osmosis membrane to be immersed in the water at all times without affecting the life due to drying. Extending the life of the reverse osmosis membrane is to ensure the quality of the effluent water, and also to improve the cost performance of the ultrapure water system.
4. Ion exchange ion exchange means that the positive ions in the water exchange with the H+ ions in the ion exchange resin, and the negative ions in the water exchange with the OH- ions on the ion exchange resin to achieve the purpose of purifying the water. By removing ions by ion exchange, it is theoretically possible to remove almost all of the ionic species, and at 25 ° C, the effluent resistivity reaches 18.2 MΩ-cm. The quality of the ion exchange effluent water depends mainly on the quality of the ion exchange resin and the exchange efficiency of water and resin in the exchange column.
The ion exchange resin on the market is mixed and the quality is uneven, which is difficult for users to distinguish. Therefore, we recommend that users pay attention to the brand of resin. The Heal Force ultrapure water system uses the world's highest quality ion exchange resin, combined with Heal Force's unique internal pressure column design to ensure that the resin is in full contact with water, significantly improving the exchange efficiency of the ion exchange column. Ability to the limit.
It should be noted here that the ion exchange method can effectively remove ions, but can not effectively remove most of the organic matter or microorganisms, and the microorganisms can be attached to the resin, and the resin is used as a medium, so that the microorganisms can rapidly grow and generate a heat source. Therefore, it needs to be designed and used in conjunction with other purification methods, which is the post-processing part we will discuss below.
5. The post-treatment mainly produces ultra-pure water with low organic matter type and low heat source type according to the special requirements of customers. There are various treatment methods for different requirements, such as ultrafiltration filtration method for removing heat source, dual-wavelength ultraviolet oxidation method for reducing total organic carbon (TOC) in water, and microfiltration to remove bacteria.
Ultrafiltration (UF) film is a molecular sieve, which is based on the size of the solution, allowing the solution to pass through a very fine filter to achieve the purpose of separating molecules of different sizes in the solution. The heat source content in ultrapure water can be reduced to 0.001 EU. /ml below. The dual-wavelength ultraviolet oxidation method can utilize photooxidation of organic compounds to reduce the total organic carbon concentration in ultrapure water to below 5 ppb.
Second, the most stable water ultra-pure water system can produce high-quality ultra-pure water is only the first step, for users to use, as long as possible to maintain high water quality as long as possible is the user's most concerned. At present, most manufacturers emphasize the attention to the use of details, often replace the consumables, and there are not many improvements from their own.
The Heal Force ultra-pure water system is completely different. It has some common functions, such as automatic setting of any time setting, standby 2 hours and various time-breaking sterilization and disinfection modes (using hydrogen peroxide as the hydrogen peroxide). Disinfectant liquid disinfection method, better protection of operators and filter columns, while ensuring the quality of ultrapure water), automatic shutdown of water cut, pure water / ultra pure water dual flow path design, etc., and a unique configuration to ensure stable water quality : Two-stage ion exchange and each stage consists of two columns, which can reduce the organic load of the UV lamp, further improve the water quality and extend the service life of the accessories. At the same time, Heal Force ultra-pure water system has up to 4 ultra-small, high-precision, 1/0.01 constant resistivity sensors, which accurately monitor the conductivity or resistivity of each pure water, and automatically compensate for temperature. TOC measurement is available for selection, resistivity, and TOC real-time detection. Through these high-precision sensors, the ultrapure water system is equipped with automatic discrimination or prompting pretreatment column, reverse osmosis membrane, primary purification column, multi-function purification column, microfiltration, ultrafiltration, UV lamp, etc. to ensure the machine It is in the best running condition to ensure the quality of water production.
Heal Force pure water / ultra pure water system
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