I just read an article published in the California Mining Journal/December 1990 concerning the problem of the formation of gold monosulfide and how dificult it is to deal with it using "standard precipitaton practices." I searched the forum and did not come up with any references to gold monosulfide. I have been using using the AP process with success and am now wondering how much gold may be trapped in my "spent" acid. Any comments from the forum?
Texan
Texan