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2. Ultrapure water - Wikipedia

   en.wikipedia.org/wiki/Ultrapure_water

   Ultrapure water (UPW), high-purity water or highly purified water (HPW) is water that has been purified to uncommonly stringent specifications. Ultrapure water is a term commonly used in manufacturing to emphasize the fact that the water is treated to the highest levels of purity for all contaminant types, including: organic and inorganic compounds; dissolved and particulate matter; volatile ...

3. Ultrafiltration - Wikipedia

   en.wikipedia.org/wiki/Ultrafiltration

   Ultrafiltration. Ultrafiltration ( UF) is a variety of membrane filtration in which forces such as pressure or concentration gradients lead to a separation through a semipermeable membrane. Suspended solids and solutes of high molecular weight are retained in the so-called retentate, while water and low molecular weight solutes pass through the ...

4. Purified water - Wikipedia

   en.wikipedia.org/wiki/Purified_water

   The conductivity of water is measured in Siemens per meter (S/m). Sea-water is typically 5 S/m, drinking water is typically in the range of 5-50 mS/m, while highly purified water can be as low as 5.5 μS/m (0.055 μS/cm), a ratio of about 1,000,000:1,000:1. Purified water is used in the pharmaceutical industry.

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6. Water filter - Wikipedia

   en.wikipedia.org/wiki/Water_filter

   A water filter removes impurities by lowering contamination of water using a fine physical barrier, a chemical process, or a biological process. Filters cleanse water to different extents, for purposes such as: providing agricultural irrigation, accessible drinking water, public and private aquariums, and the safe use of ponds and swimming pools .

7. Ultrafilter - Wikipedia

   en.wikipedia.org/wiki/Ultrafilter

   In order theory, an ultrafilter is a subset of a partially ordered set that is maximal among all proper filters. This implies that any filter that properly contains an ultrafilter has to be equal to the whole poset. Formally, if is a set, partially ordered by then. a subset is called a filter on if. is nonempty,

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9. LifeSaver bottle - Wikipedia

   en.wikipedia.org/wiki/LifeSaver_bottle

   The LiveSaver bottle has been used by soldiers for drinking water as well as cleaning wounds. [2] [3] [4] To filter the water, one puts contaminated water in the back of the bottle, then screws the lid on. The lid has a built in pump which is operated manually with a hand; the pumping action forces the contaminated water through the nano-filter ...