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Main uses of laboratory ultrapure water generators. The common processes for producing ultrapure water include distillation, reverse osmosis, ion exchange, filtration, adsorption, and UV oxidation. Ultra-pure water machines can generally divide the water purification process into four main steps: pre-treatment (primary purification), reverse osmosis (to produce pure water), ion exchange (to produce ultra-pure water with a resistivity of 18.2 MΩ·cm), and final treatment (to produce ultra-pure water that meets specific requirements). Laboratory ultra-pure water machines are primarily used for: water for the culture of animal and plant cells; water for various medical biochemical instruments, analyzers, and hemodialysis machines; water for preparing and diluting analytical reagents and drugs; water for physiological, pathological, and toxicological experiments; purified water and ultra-pure water for hospitals, pharmaceutical preparation rooms, and central laboratories; water for atomic absorption spectroscopy; water for in vitro fertilization; water for various liquid chromatography and ion chromatography applications. They are also widely used in industries such as universities, research institutions, pharmaceutical factories, power generation, electronics, healthcare, disease control, environmental monitoring, quality inspection, as well as in large-scale industrial pure water systems