Abstract
A closed-vessel microwave dissolution procedure has been shown to reduce the time and amount of aqua regia(3 parts HCl + part HNO3) required to dissolve platinum in comparison with conventional open-vessel hot-plate dissolution. Analytical results for the determination of Au, Pd and Pt indicated that both the microwave and hot-plate procedures gave low acid blank concentration values for Pb and Pd. Experiments with gold indicate that the closed-vessel microwave dissolution procedure should be used in areas where the risk of environmental contamination is high.
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