Fritted glass

Finely porous glass permeable to fluids A sintered glass filter connected to a Büchner flask Fritted glass funnels Fritted glass is finely porous glass through which gas or liquid may pass, made by sintering together glass particles into a solid but porous body. This porous glass body can also be called a frit. Applications in laboratory glassware include use in fritted glass filter items, scrubbers, or spargers. Other laboratory applications of fritted glass include packing in chromatography columns and resin beds for special chemical synthesis. In a fritted glass filter, a disc or pane of fritted glass is used to filter out solid particles, precipitate, or residue from a fluid, similar to a piece of filter paper. The fluid can go through the pores in the fritted glass, but the frit will often stop a solid from going through. A fritted filter is often part of a glassware item, so fritted glass funnels and fritted glass crucibles are available. Laboratory scale spargers (also known as gas diffusing stones or diffusors) as well as scrubbers, and gas-washing bottles (or Drechsel bottles) are similar glassware items which may use a fritted glass piece fused to the tip of a gas-inlet