cupellation


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Related to cupellation: fire assay

cu·pel·la·tion

 (kyo͞o′pə-lā′shən)
n.
A refining process for nonoxidizing metals, such as silver and gold, in which a metallic mixture is oxidized at high temperatures and base metals are separated by absorption into the walls of a cupel.

cupellation

(ˌkjuːpɪˈleɪʃən)
n
1. (Metallurgy) the process of recovering precious metals from lead by melting the alloy in a cupel and oxidizing the lead by means of an air blast
2. (Metallurgy) the manufacture of lead oxide by melting and oxidizing lead
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References in periodicals archive ?
One of the first advanced technologies to be explored, developed and introduced was X-Ray Fluorescence testing, to replace the traditional assay methods of cupellation and titration for gold and silver.
To improve quality like that of gold by cupellation, he forged a matrix to remove dross from evaluation.
it had contributed to exchange of values between East and West by achieving the large-scale production of high quality silver through the development of the Asian cupellation techniques transferred from China through Korea and the Japanese unique assemblage of numerous labor-intensive small businesses based upon manual techniques in the 16th century.
Although mimetite specimens from Dry Gill are known to have been collected at least as early as 1830 there is no record of commercial ore mining there until a lease was taken by Hugh Lee Pattison, inventor of a cupellation process for the desilvering of lead.
Martyn felt the piece should include appropriate symbolism so his design depicts the structure of the Palladium atom, vibrantly coloured flames to represent the traditional cupellation method of fire assaying and a typical "read out" from an X Ray fluorescence machine which uses the latest technology to assay pieces prior to hallmarking.
There is no need for cupellation or types of analysis such as gravimetric analysis, ICP/MS, or ICP/OES.
Consider Leibniz's definition of gold: "gold is a metal which resists cupellation and is insoluble in aqua fortis; that is a distinct idea, for it gives the criteria or definition of gold.
Applications have included tin concentrate smelting, tin slag reduction, direct lead smelting, copper concentrate smelting, copper matte converting, nickel laterite smelting, nickel slag reduction, zinc fuming from blast furnace slag, silver retort bullion cupellation and the recovery of gold from complex intermediates.
BRM) to improve on conventional cupellation where air is blown over the surface of the molten metal to progressively oxidize impurities.
We have observed that the unique poly-metallic nature of the El Capitan deposit results in significant slag and/or cupellation losses when using lead collection fire assay, and the oxide nature of the deposit does not lend itself well to the application of nickel sulfide fire assays techniques typically used in sulfide PGM deposits.
The bar and the dip sample will be tested by XRF to double check they are consistent then the dip sample will be assayed by the cupellation method, to give a highly accurate result.