Fritted glass is finely porous glass through which gas or liquid may pass. It is 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 for special chemical synthesis.
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| - Frita (cs)
- Fritte (Filter) (de)
- Fritted glass (en)
- Glasfilter (sv)
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| - Die Fritte ist ein Filter aus Glas oder Keramik, der zum Filtern auch feinster Partikel verwendet wird. Das Glas oder die Keramik sind porös, so dass der herauszufilternde Stoff wie in einem sehr feinen Sieb in den Poren hängen bleibt. (de)
- Frity jsou tenké skleněné nebo porcelánové trubičky spečené do kruhové desky. Mají různou velikostí . Obvykle bývají zataveny do skleněných filtračních kelímků nebo nálevek, ale dostupné jsou i samostatné kruhové desky, jež se nazývají . Toto slouží k filtraci. Frity se dělí podle velikosti jejich pórů. Velikosti pórů se označují písmenem „S“ a číslem od 1 do 5:
* S1 – největší póry
* S2 – filtrace větších krystalů
* S3 – filtrace menších krystalů
* S4 – filtrace sraženin (i velmi jemných)
* S5 – filtrace bakterií (cs)
- Fritted glass is finely porous glass through which gas or liquid may pass. It is 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 for special chemical synthesis. (en)
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| - Frity jsou tenké skleněné nebo porcelánové trubičky spečené do kruhové desky. Mají různou velikostí . Obvykle bývají zataveny do skleněných filtračních kelímků nebo nálevek, ale dostupné jsou i samostatné kruhové desky, jež se nazývají . Toto slouží k filtraci. Frity se dělí podle velikosti jejich pórů. Velikosti pórů se označují písmenem „S“ a číslem od 1 do 5:
* S1 – největší póry
* S2 – filtrace větších krystalů
* S3 – filtrace menších krystalů
* S4 – filtrace sraženin (i velmi jemných)
* S5 – filtrace bakterií Filtrace na fritách probíhá za sníženého tlaku (např. z frity S4 za normálního tlaku voda pouze lehce prosakuje). (cs)
- Die Fritte ist ein Filter aus Glas oder Keramik, der zum Filtern auch feinster Partikel verwendet wird. Das Glas oder die Keramik sind porös, so dass der herauszufilternde Stoff wie in einem sehr feinen Sieb in den Poren hängen bleibt. (de)
- Fritted glass is finely porous glass through which gas or liquid may pass. It is 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 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 tube. This fritted glass tip is placed inside the vessel with liquid inside during use such that the fritted tip is submerged in the liquid. To maximize surface area contact of the gas to the liquid, a stream of gaseous particles is slowly blown into the vessel through the fritted glass tip so that it breaks up the gas into many tiny bubbles. The purpose of sparging is to saturate the enclosed liquid with the gas, often to displace another gaseous component. The purpose of a scrubber or gas-washing bottle is to scrub the gas such that the liquid absorbs one (or more) of the gaseous components to remove it from the gas stream, effectively purifying the gas stream. Because frits are made up of particles of glass that are bonded together by small contact areas, they are not normally used in strongly alkaline conditions, as these can dissolve the glass to some extent. This is not normally a problem, as the amount dissolved is usually minute, but the equally minute bonds in a frit can be dissolved away by strong alkalis, causing the frit to fall apart over time. (en)
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