We made a pellet out of it and ran it on an xray fluorescence spectrometer.
If you wanted the wet chem way, I would have to charge a substantial fee to find my notes. from 1980's.
Hm, I take that back, I was running CaO MgO and SiO2.
Milo
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People say between two opposed opinions the truth lies in the middle. Not at all! Between them lies the problem, what is unseeable,eternally active life, contemplated in repose. Goethe