Mike,

We use an Atomic Absorption Spectrophotometer for the gold content
analysis.  I know that Technic's lab here in the Chicago area uses the
same technique.

Varian and Perkin-Elmer are two manufacturers that readily come to
mind.  I'm not sure of the cost new, but I bet you could get a used or
reconditioned model for a reasonable price.

--Mike Owens
[log in to unmask]
Bartlett, IL

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