G4 Crucible
Posted: Fri Jun 19, 2009 5:21 am
Please can anybody suggest which type of G4 crucible can be used with heating upto 900°C
Hi
Unless I misunderstand, you are referering to a glass cruiceble with a sintered glass bottom with porosity G4?
If thats the case it may be hard to find as typical 3.3 borosilicate glassware should not be operated above 200°C, however there should be some glasswares that may tolerate 500°C.
However, there are sintered porcelain crucibles that can be operated at that temperature, but I could not find a supplier when I breifly looked for one.
Why do you need to heat it up so much?
If it is to remove insouble organics, "chromic acid" is not a uncommon approach to remove such residues from glassware of that type. A bit nasty to handle though.
But I understand that the high temperature is needed for some inorganic analyses.