Extracting Gold From Pc Boards With Fire
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plant,extracting gold from pc boards with fire

plant,extracting gold from pc boards with fire

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Nov 19 2009 to test the solution for remaining gold first immerse the end of the stirring rod in the acid remove it and touch that end to a paper towel to make a wet spot put a drop of gold detection liquid on the wet spot on the paper towel if any gold is still dissolved in the acid the wet spot will turn a purple-black or a purple-brown.

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