FIELD: extraction of platinum and iridium from surface of refractory ceramics. SUBSTANCE: essence of invention lies in treatment of surface layer of ceramics with sulphuric acid having concentration 50-98% with heating up to 100-400 C. After cooling leaching of surface layer of ceramics is conducted with water at 20-95 C. Treatment of ceramics with sulphuric acid can be performed with addition of ammonium sulphate or sodium sulphate or potassium sulphate in mole proportion 1.0:0.1-1.0. EFFECT: enhanced efficiency of extraction of platinum and iridium. 1 tbl, 2 cl
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