Ultrapure water or type I water is the purest type of lab water. It is typically used for applications that require a very low level of contamination like HPLC, AA, ICP-MS, GC,…
Ultrapure lab water systems can either produce the water from tab water directly or from already purified water. When ultrapure water is produced from purified water, the system can either be connected to pressurized water from a central loop system, or directly to a tank that is fed by a pure water system. If pure water is already available at the point of usage for the ultrapure water, than pure water feeding is preferred because of the lower consumable cost for the ultrapure water system. When produced from tab water directly, the production process will also include the steps required for RO water (type III) or pure water (type II). That’s why type I water produced from tab water will often be combo systems, that also allow RO water or pure water to be dispensed for other applications.