Curbina - can you prove this is never done?
This is silly.
But, just on a 10s google:
It seems XRF is used a lot to work out the elemental composition of electrodes after electrolysis!
My goodness, this really baffles me that you point me to articles that are studying metal separation by electrolysis in which the metals are known and purposefully added to the electrolite and hence expected to be deposited in either electrode.
What I meant (kind of obvious tho) is anyone finding them when the electrolitic solution is made of ultrapure water and p.a. salts, for hydrogen production.