Cleaning Gold Precipitated From Dirty E-Waste Solutions

Here I show how I clean up dirty gold that has been precipitated out of dirty solutions, and contaminated with lots of base metals. This is useful knowledge for anyone working on recovering gold from e-waste. There will be base metal contamination. Please visit the Urban Gold Mining section of my web site at mdpub.com/Urban... for more information.
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Chemicals used in these videos:
Nitric Acid: xelexo.net/ind...
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