After cupellation, the resulting metal bead is further purified by:
Electrolysis
Distillation
Sublimation
Extraction
After cupellation, which is a refining process used for noble metals such as gold or silver, the resulting metal bead may still contain impurities. To further purify the metal, electrolysis is commonly employed.
Electrolysis involves the use of an electric current to separate and remove impurities from the metal. The metal bead is typically placed as the anode (positive electrode) in an electrolytic cell, while a suitable electrolyte solution is used as the cathode (negative electrode).
When the electric current is passed through the cell, metal ions from the impurities migrate towards the cathode and are deposited there, forming a separate layer or sediment. This process is known as electrodeposition or electrorefining. The impurities are effectively separated from the purified metal bead and can be discarded.
The metal bead, now purified through electrolysis, can be further processed or used in various applications.