Talk:Nines (notation)

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The content of Purity (gas) was merged into Nines (notation) on 23 Aug 2018. The former page's history now serves to provide attribution for that content in the latter page, and it must not be deleted as long as the latter page exists. For the discussion at that location, see its talk page.

Refining and testing procedures for 4N gold

what about four 9s of Gold? i.e. 999.9 pure gold? Can anyone help me in finding out the difference between 999 and 999.9 gold. I know that the difference is 0.09% purity difference. But I would like to know the refining procedures and testing procedures between these two purities. — Preceding unsigned comment added by 122.169.141.80 (talk) 15:05, 2 April 2008 (UTC)[reply]