When the pure water of the pure water storage tank is taken, the water level in the water tank will drop, and then the air will enter the water tank to replace the space of the original water, and the impurities in the air will enter the pure water to cause pollution. What are the impurities in these air mainly containing those substances? The following table shows the standard values ​​set for indoor air in the People's Republic of China standard GBT18883-2002 Indoor Air Quality Standard: carbon dioxide CO2 Total volatile organic compounds VOC Respirable particles PM10 When CO2 in the air is dissolved in pure water, it will combine with water to form H2CO3 carbonate. Carbonic acid is weak acid but will dissociate into carbonate ions H+ and HCO3-, which will increase the ion concentration in water, increase the conductivity value, and reduce the purity. The pH of the water. Volatile Organic Compounds (VOCs) are any organic liquids and/or solids that can self-expose at normal temperature and pressure. Dissolving volatile organic compounds in water significantly increases the TOC value of pure water. The main sources of common VOCs in the laboratory include common organic solvents such as acetone, ethanol, ether and dichloromethane, air conditioning systems with insufficient cleaning frequency, heating and cooling, materials used for furniture and decoration, plastic materials, paints, etc. Inhalable particles are particles that are suspended in the air and can enter the body's respiratory system. Respirable particles increase the particulate matter content of pure water, and it is also the main food source (organic and inorganic) for the formation of bacterial membranes in pure water storage tanks, which will deteriorate the water quality of the ultrapure water system connected to the back end and affect the use of consumables. life. Bacterial contamination can be the direct cause of the bacterial membrane produced by pure water storage tanks. It makes the water in the life science laboratory extremely worrying. The bacteria will produce RNase, DNase, protease, endotoxin and other biological pollution. So how do you isolate these pollutions? We usually use a tank air filter to protect the water quality of the tank. The internal components of the water tank air filter mainly include carbon dioxide adsorbent, activated carbon, hydrophobic filter membrane and the like. The carbon dioxide sorbent effectively removes CO2 from the air, which neutralizes the carbon dioxide in the air and prevents it from entering the tank. Activated carbon can adsorb VOC in the air, can effectively isolate a variety of volatile organic compounds in the environment, and ensure the stability of the ultra-pure water at the back end. The hydrophobic filter membrane effectively intercepts suspended particles in the air and biological sources of pollution, and can avoid or delay the contamination of organic matter in the pure water tank and the formation of the membrane. Pure water systems need to be concerned about the possibility of pollution at all levels, and any level of pollution must be prevented to ensure the final water quality results. Related product links please click     Water tank air filter About RephiLe : RephiLe is a professional manufacturer and supplier of water purification and laboratory separation and purification products with a strong technical background in laboratory water and filtration. RephiLe based on its own research and development results, driven by innovation and service-oriented, gradually established its own product brand, with independent intellectual property rights and obtained a number of patents. The management concept of international operation, perfect and reliable quality monitoring and guarantee system make RephiLe 's products high quality and reliable. Once entered the market, it is recognized and favored by the majority of users. It is at the high-end leading technology and quality level among similar products in China. RephiLe has cooperated with many leading technology institutions at home and abroad, and its products are sold to more than 80 countries in Europe and America . For more information on RephiLe products, please visit: RephiLe official website Official Weibo: RephiLe Weibo Official Blog: RephiLe Blog
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How to protect the quality of pure water in the water tank