Isotope analysis of the alloying elements is a good idea. What sort of instrumentation is required for that? I know I don't have access to that instrumentation, but I might be able to find another lab within my organization that does.
I will look at the standards of the suspected countries of origin. This is certainly an easier solution, as long as their specs are different enough to notice.
I was thinking the same thing, and I am willing to tell my customer that it cannot be done. Thanks for your input!
Not to complicate things further but there may be an additional difficulty in identifying the country of origin of aluminum components: In some cases, the country of origin of the ore may not be the same as the country of production of aluminum metal. E.g., for a long time Greek bauxite was converted to alumina, which was subsequently shipped to a different country in Europe to electrolytically produce aluminum. I do not know how prevalent this practice is today, but depending on the age of your parts or artifacts that may be a concern.
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