Having read with interest the recent thread on the testing of the purity of silver
http://goldrefiningforum.com/phpBB3/viewtopic.php?f=41&t=25954
4metals method was very interesting and seems pretty straight forward. It has me curious if there is such a method that could be used for copper. Something fairly quick, and can give a base indication if it is with in the 3N or better range.
http://goldrefiningforum.com/phpBB3/viewtopic.php?f=41&t=25954
4metals method was very interesting and seems pretty straight forward. It has me curious if there is such a method that could be used for copper. Something fairly quick, and can give a base indication if it is with in the 3N or better range.