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Dry Wash Method Gold Seperation

Used to dissolve high karat gold, gold powder, gold foils, dissolves Platinum when hot. Excess nitric must be evaporated off or neutralized with Urea to pH 1 0.4, then drop gold with SMB. Hoke states 4 fluid ounces HCl 1 fluid ounce HNO3 dissolves 1 troy ounce gold. This is equivalent to 3.8 mL HCl .95 mL HNO3 per gram of gold. 1.

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