Contents -- Introduction -- 1. PURE METALS AND CLASSIFICATION OF THE METHODS OF PREPARATION OF PURE SUBSTANCES -- 2. GENERAL CHARACTERISTICS AND CLASSIFICATION OF METHODS OF SEPARATION AND REFINING OF SUBSTANCES -- 3. SORPTION -- 4. EXTRACTION -- 5. CRYSTALLISATION -- 6. CRYSTALLISATION FROM MELTS -- 7. EVAPORATION, CONDENSATION, TRANSPORT REACTIONS 7.1. The theory of separation of compounds by evaporation and condensation -- 8. ELECTROLYSIS -- 9. ELECTROTRANSPORT -- 10. DIFFUSION -- 11. SELECTIVE PRECIPITATION, OXIDATION AND REDUCTION -- 12. DEGASIFICATION OF METALS -- 13. METHODS OF TESTING PURE METALS -- References -- SYMBOLS -- APPENDICES -- INDEX.