Author Topic: Gold electrode weight test & results  (Read 211 times)

Offline SaltyCornflakes

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Gold electrode weight test & results
« on: October 12, 2019, 08:55:36 AM »
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.
« Last Edit: October 12, 2019, 09:22:43 AM by SaltyCornflakes »

Offline cfnisbet

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Re: Gold electrode weight test & results
« Reply #1 on: October 12, 2019, 09:14:51 AM »
No, you need to use sodium chloride to give the chloride ion for the correct process. We are reducing gold chloride, and the chloride has to come from somewhere.
« Last Edit: October 20, 2019, 07:57:22 PM by cfnisbet »

Offline SaltyCornflakes

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Re: Gold electrode weight test & results
« Reply #2 on: October 12, 2019, 09:21:24 AM »
That's what I figured, cheers. So that eliminates the only possibility for using up extra gold. The sodium chloride is measured close to exact for 40ppm.

It would be great if someone with an accurate scale doing Electrolysis III could post their results.
« Last Edit: October 12, 2019, 10:31:09 AM by SaltyCornflakes »

Offline SaltyCornflakes

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Re: Gold electrode weight test & results
« Reply #3 on: October 19, 2019, 02:02:43 PM »
I confirmed the weights. Really curious to hear what could be the reason for this, and how to use gold more effectively. Higher voltage?

Offline cfnisbet

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Re: Gold electrode weight test & results
« Reply #4 on: October 20, 2019, 07:58:37 PM »
The general case is that you run the maximum voltage available from the PSU. Turn off any Constant Current setting.