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As part of a study on the quantitative separation of carbide, nitride, oxide and sulphide inclusions from metals, the solubilities of aluminium, chromium, cobalt, copper, iron, lead, manganese, molybdenum, nickel, niobium, phosphorus, silicon, sulphur, tin, titanium, tungsten and vanadium have been determined a t 25 "C in organic solventbromine mixtures (10 + 1 V / V ) after refluxing. The solvents were methyl acetate, butyl acetate and acetonitrile. All of the above elements except lead, molybdenum, silicon and tungsten were appreciably or very soluble in these solvents. Molybdenum was sparingly soluble and the others almost insoluble.

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Polarographic data for 23 inorganic species in acetic acid-acetic anhydride (20:l. v/v) are reported, the base electrolytes being 0.25~1-sodium perchlorate, 0~25M-sodium acetate, and 0.25~1-iithium chloride. Evidence is presented to show that inorganic ions are solvated less readily in the organic solvent than in aqueous solution, but the order of reduction of ions is similar to that for aqueous solutions, with the exception of nickel, which is reduced much more readily in the non-aqueous solvent. Both acetate and chloride ions are moderately good complexing agents for inorganic ions in the organic solvent.