Answer:
Tin(IV) is separated quantitatively from many other metal ions by reversed-phase chromatography on a column of solid support impregnated with an organic liquid. When aqueous 8M hydrochloric acid is used as the eluent, tin(IV) is retained on a column impregnated with methyl isobutyl ketone and is separated quantitatively from bismuth(III), cadmium(II), copper(II), lead(II), mercury(II) and zinc(II). For the separation of tin(IV) and molybdenum(VI) the aqueous elut ing phase is 1M hydrochloric acid-3M sulphuric acid. A column impregnated with isopropyl ether quantitatively retains antimony(V) from 8M hydrochloric acid and permits tin(IV) to be eluted rapidly.
