Precision at its Finest: Elevate Your Lab Experiments with Global Lab Supplies
Related Products
Magnesia Cupel
Cupel is a shallow, porous crucible with approximately 96% magnesia. It is especially used to separate gold, silver, and precious metals from lead buckles in the process of Pb-Fire assay. By using high-quality raw materials and scientific formulas, GLS’s fire assay magnesia cupel has a smooth surface, high mechanical strength, and will not crack and pit during high-temperature cupellation.
Tungston Carbide Bowls
The series of grinding bowls of Global Lab Supply has good wear resistance and impact resistance. A unique range of bowls from 40 to 5000g nominal capacity. Global Lab Supplies delivers this high-capacity, high production bowl to the sample preparation needs.
Bullion Blocks
Magnesia Bullion Block is a shallow, porous block with multiple holes, made from pure Magnesite, in which gold or silver can be refined or assayed by melting with a blast of hot air which oxidizes lead or other base metals.
Bullion Blocks are specifically designed to stand longer in the extreme heat of furnaces. These blocks are great heat conductors and high efficient to use.
These do not not crack or break over the course of time as well as demands no maintenance. Moreover, these Blocks are extremely durable and available in various specifications.
![Zirconium Crucibles [straight wall]](https://globallabsupplies.com/wp-content/uploads/2024/02/Untitled-1-1-450x450.png)
Zirconium Crucibles [straight wall]
Zirconium is our most effective crucible material for fusions using sodium carbonate or sodium peroxide. It is an excellent low-cost replacement for platinum. And, based on an average of 100 fusions per crucible, it is more cost effective than less expensive porcelain or steel crucibles.
Other advantages of zirconium are its complete resistance to the action of most solvents of all concentrations such as nitric, hydrochloric, sulfuric and perchloric acids.
This allows the fusions to be dissolved out of the crucible completely with little or no contamination of the sample. Alkaline solvents such as ammonium hydroxide, acetate sulfide, carbonate and (Na, K) hydroxide, sulfide, carbonate and cyanide are also without effect.
