We supply a range of quartz baskets that allow to carry out the successive parting and annealing operations in the same container. 

The reason this is possible, is that quartz baskets are capable of withstanding:

• Attack of concentrated nitric acid
• High temperature necessary for annealing (up to 1000ºC)
• Thermal shock due to very low coefficient of thermal expansion.

Consequently, they can substitute both parting flasks, and gold annealing crucibles.

Furthermore, they are also suitable for processing samples in parallel during the two nitric acid attacks (the first with nitric acid 33%, the second with nitric acid 49%), and then go directly in the gold annealing furnace (after rincing with water).

In addition to this, the baskets are fitted with removable thimbles with thin slits to evacuate the nitric acid / distilled water and possess a flange at the top to fit the holes of the basket. Thererfore,  it is possible to supply them as spares in case of breakage. There are two types of quartz thimbles / crucibles and they suit most cornet sizes:

– R1 Thimble: With cross slits

– R2 Thimble: With laterla slits

Last but not least, we also supply the borosilicate beakers in various sizes to fit the diagonal of the baskets. The beakers are supplied with watch lids or with a chimney to avoid nitric acid spillage at boiling point or to conduct the vapours.

The following parting and annealing baskets configurations are available in stock, and larger baskets (64 or 81 pieces are available under order):

Basket Reference	Dimensions (L x W x H) (mm)	Capacity (samples)	Picture
QBR-9	57x57x70	9 (3 x 3)
QBR-16	72x72x70	16 (4 x 4)
QBR-25	87x87x70	25 (5 x 5)
QBR-36	102x102x70	36 (6 x 6)
QBR-49	117x117x70	49 (7 x 7)