acid method for high cocentration of gold ore

Copper, Silver and Gold - University of Denver Modern methods of parting include the use of sulphuric or nitric acid, which dissolves the silver, or electrolysis. Silver can be parted from gold by bubbling chlorine through the molten metal; under these conditions it produces AgCl and leaves the pure gold behind. 3 Ways to Assay Gold - wikiHow Jan 18, 2017· How to Assay Gold. In this Article: Testing Gold with Fire Dissolving Gold in Aqua Regia Examining Gold with ED-XRF Spectrometry Community Q&A The naked eye cannot determine the purity of metals. This holds true for ore and jewelry alike. In order to determine the percent composition of a sample of gold, the sample must be assayed. How to Extract Gold From Electronics: 11 Steps (with Pictures) Aqua Regia is the only acid that will dissolve gold but there are quite a few non-acids that will dissolve gold. The industry uses cyanide and/or mercury to extract trace gold from ore but these are both intensely poisonous and should not be tried at home.    Read More

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