Solvent extraction of antimony(III) with 18-crown-6 from iodide media.
Antimony can be quantitatively extracted from 1M sulphuric acid containing 0.25M potassium iodide with 0.02M 18-crown-6 in methylene chloride, and determined spectrophotometrically at 430 nm. Bismuth, tin, antimony and arsenic can be separated by sequential extraction with 18-crown-6 from aqueous phases with appropriately adjusted sulphuric acid and potassium iodide concentrations.
Vibhute
R G
RG
Department of Chemistry, Indian Institute of Technology, Bombay-400076, India.
Khopkar
S M
SM