7158 - Regular-Purity Graphite Crucible, 27 mL

• Specifically designed with a flat bottom for casting 31 mm diameter glass disks.
• Cost effective alternative to precious metal crucibles and molds.
• Disposable and eliminates the need for time-consuming cleaning procedures and the possibility of cross-sample contamination.
• Chemically inert and heat-resistant.
• Made of regular-purity graphite with impurities ranging from 10 to 100 ppm each of Mg, Fe, Al, Si and Cu.
• Well suited for most basic borate fusion applications.

44.4 mm O.D. x 38.1 mm tall. 31 mm I.D. with flat bottom. 27 mL capacity.

Disposable crucibles eliminate the need for time-consuming cleaning procedures and the possibility of cross-sample contamination. Regular-purity crucibles are made of graphite with impurities ranging from 10 to 100 ppm each of Mg, Fe, Al, Si, and Cu. They are well suited for most basic borate fusion applications. High-purity crucibles are made of graphite with total metallic impurity limits of 2 ppm—ideal for trace-level analytical work.

Sold in packs of 10 crucibles.

Note: Glass disks cast in graphite crucibles will have rough faces which should be polished flat for analytical accuracy.