Rapid decomposition and dissolution of silicate rocks by fusion with lithium tetraborate and lithium sulphate.
Fusion with 1.0 g of Li(2)B(4)O(7)Li(2)SO(4) (2:1) mixture in a platinum crucible at 1000 degrees will decompose 0.1 g of silicate rock in less than 10-15 min, and the cooled fusion cake can be completely dissolved by 20 ml of 1.2M hydrochloric acid at 90-100 degrees in approximately 5 min.
Yoshikuni
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Laboratory for Analytical Chemistry, Faculty of Engineering, Chiba University, Yayoi-cho, Chiba, Japan.