Porcelain filter crucible

A porcelain filter crucible , also known as a frit , is a crucible that has a sintered filter layer instead of an impermeable bottom. It is used to filter suspensions with relatively small particles. To do this, it is usually placed on a vacuum so that the liquid flows through faster. To do this, it is usually placed on a suction bottle that is connected to a water jet pump. It looks like a normal crucible, except that the bottom is rough instead of a smooth, shiny surface. The porcelain filter crucible is used in gravimetry .

A glass filter crucible or glass frit has the same structure but is made of glass.

literature

• DIN 12909: 1980-07 laboratory equipment made of hard porcelain; Filter crucible , July 1980.