cupellation sentence in Hindi
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- Some of these cast silver artifacts contained less than 0.5 % lead, which strongly indicates cupellation.
- At the time that the Gundestrup cauldron was created, silver was obtained through cupellation of lead / silver ores.
- By the Middle Ages and the Renaissance, cupellation was one of the most common processes for refining precious metals.
- Since the Renaissance, cupellation became a standardised method of analysis that has changed very little, demonstrating its efficiency.
- Fire assay, as applied to ores, concentrates or less pure metals, adds a fusion or scorification step before cupellation.
- Cupellation was able to remove gold and silver from mixtures containing lead and other metals, but silver could not be removed.
- Cupellation involved removing the lead from a silver-rich alloy by oxidising the lead to litharge, leaving the silver behind.
- Small-scale cupellation may be considered the most important fire assay developed in history, and perhaps the origin of chemical analysis.
- After solidification, the samples are knocked out, and the lead bullets recovered for cupellation, or for analysis by other means.
- In the Americas, high temperature silver-lead cupellation technology was developed by pre-Inca civilizations as early as AD 60 120.
- A problem with using reverberatory furnaces for cupellation is that the zinc oxidizes first, forming a crust across the top of the molten material.
- The earlier process of " cupellation " had required at least 8 ounces ( 250 grams ) of silver per ton of lead to be economic.
- As the main purpose of small scale cupellation was to assay and test minerals and metals, the matter to be tested has to be carefully weighed.
- Georg Agricola and Lazarus Ercker, among others, wrote about the art of mining and testing the ores, as well as detailed descriptions of cupellation.
- The use of cupellation, a process developed before the rise of Rome, would extract copper from gold and silver, or an alloy called electrum.
- Similar to the Anglo-Saxon method for cupellation, the Chinese employed the use of a base metal to extract the target metal from its impurities.
- The metals are then melted at high temperature ( greater than 1100 �C ) in the crucible while air is blown over the molten metal ( cupellation ).
- Cupellation started long before the Post Medieval period, however the first vessels made to carry out this process started in the 16th Century ( Rehren 2003 : p208 ).
- Prior to the development of the BBOC, BRM used cupellation in a 15 tonne ( t ) reverberatory cupellation furnace to recover the precious metals from this mixture.
- Prior to the development of the BBOC, BRM used cupellation in a 15 tonne ( t ) reverberatory cupellation furnace to recover the precious metals from this mixture.
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