I have tested two gold coins. The scale used is a no-name 0.01g scale. But let's assume that if the scale is off, it should be off in both cases. The weights are not that different.
A Maple Leaf in mint condition reads as 31.20g, averaged over 5 weightings of 31.19g - 31.21g.
A Maple Leaf after having ran 13 litres of Electrolysis III (40ppm, using aqua bidest) reads as 29.97g, averaged over 5 weightings of 29.96g - 29.99g.
13 x 40mg gold lost should amount to only 520mg total. But I'm seeing more than twice that at 1.23g. How can this be?
Related question: Does sodium carbonate act like sodium chloride to pull more gold from the electrode? Using a bit of sodium carbonate results in much better particle size for me. Leaving it out has always resulted in a purple product.