The essence of the ultra-pure water machine is to filter out impurities in the water to obtain extremely pure water. Therefore, in nature, pure water composed of H2O molecules alone does not exist, and the water usually contains the following various impurities: 1. Particulate matter: Insoluble inorganic and organic impurities greater than 10 μm in water (where more than 40 μm are visible to the naked eye), such as sediment, metal oxides or hydroxides commonly found in tap water. 2. Ionic substance: refers to a substance that dissolves into water and dissociates into anion and a cation. The sum of the anion and cation in the water is called the salt content of water. If the content of iron and manganese (Fe2+, Mn2+) in water exceeds the standard (>0.3mg/L), iron and manganese ions should be removed by manganese sand filter or aeration device, otherwise it will form an unclear deposition fouling on RO membrane. 3. Colloid: An impurity that is aggregated and bound together by microorganisms, micro-particles, etc., and has a size between ionic and particulate matter, usually with a negative charge, and is easily combined with organic substances. 4. Organic matter: The substance can be divided into two categories: organic matter and inorganic matter. Hydrocarbon compounds are organic substances, and non-hydrocarbon compounds are inorganic substances. Organic matter can usually be burned as the main substance that makes up life. Natural organic matter is mainly humic acid produced by aquatic organisms. The organic substances dissolved in water are mainly macromolecular weak organic acids of multifunctional aromatic groups, which are easily adsorbed on the RO membrane layer and cause deterioration of RO membrane performance. 5. Gas: Some gases such as O2, CO2, NH3, N2 are soluble in water, and some acid ions are formed after reaction in water, which affects the water quality of the finished water. If ultrapure water is left in the air, the temperament will drop rapidly. 6, microorganisms: bacteria, viruses, spores, etc., the size of which is micron. 7, pyrogen: pure water is a very low nutrient environment of water, but there are still a small number of bacteria - Gram-negative bacteria - can survive, if its cell membrane into the human blood, it will lead to fever, high fever or even death, it is called Pyrogen (also known as endotoxin). Water for injection and laboratory water for biological cells require removal of pyrogens. 8, disinfectants: raw water treatment after water companies, the water would have a disinfectant such as sodium hypochlorite, chlorine contained in water (the national standard must be greater than 0.3ppm) is a strong oxidizing substances, a considerable role in the destruction RO membrane, the The activated carbon filter element and filter material in the pure water machine can effectively remove residual chlorine in the water. Snacks usually refer to the food eaten outside the time point of three meals a day. Under normal circumstances, in people's life, except that three meals a day are called dinner food, the rest are called snacks. Canned fruit is a healthy snack. AGOLYN wholesale all kinds of canned fruit, such as canned yellow peach, canned orange, etc Snacks,Canned Lychee,Canned Peaches,Canned Fruit Xi'an Gawen Biotechnology Co., Ltd , https://www.seoagolyn.com