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Filter (chemistry)



 In chemistry and common usage, a filter is a device (usually a membrane or layer) that is designed to block certain objects or substances while letting others through. Filters are often used to remove harmful substances from air or water, for example to remove air pollution, to make water drinkable, to prepare coffee. In domestic food and drink preparation where bulk solids are removed from liquids, this is often called a strainer.

Filtrate is the liquid produced after filtering a suspension of a solid in a liquid. Filtrand (or Residue) is the solid residue remaining in the filter following filtration[citation needed].

Additional recommended knowledge

For certain situations, such as separating an aqueous substance from a solid one, filtering may be replaced with decanting.

See also

  • tubular fluid, the renal glomerulus filtrate

Filters for various substances:

Filters for specific applications:

Filters by various methods:

Related devices and concepts:

 
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Filter_(chemistry)". A list of authors is available in Wikipedia.
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