Gooch crucible

It is convenient for collecting a precipitate directly within the vessel in which it is to be dried, possibly ashed, and finally weighed in gravimetric analysis.

The device was originally a standard platinum laboratory crucible with a perforated base into which asbestos pulp was placed to form the filter mat.

However, because of the high cost of platinum, versions made of porcelain were introduced in 1882.

[3] Some Gooch crucibles, such as the one in the drawing, permit two layers of asbestos to be used, separated by a perforated porcelain plate.

[1] Gooch crucibles made of platinum may still be required for the most corrosive materials, porcelain is used where ashing at high temperature is required, and those made of borosilicate glass are adequate for drying.