title: Determination of cerium in minerals with sulphanilic acid.
abstract: Cerium can be determined colorimetrically in minerals with sulphanilic acid. Cerium(III) ions are oxidized with silver(II) in 1-7% sulphuric acid. Sulphanilic acid is oxidized by cerium(IV) ions in 20% sulphuric acid. The absorbance is determined at 540 nm. In the presence of maganese or chromium, cerium can be separated by precipitation as the oxalate. Lanthanum can be used as a gathering agent if necessary.
authors.affiliation: Ledgemont Laboratory Kennecott Copper Corporation Lexington, Massachussetts 02173, U.S.A.
authors.forename: E N
authors.initials: EN
authors.lastname: Pollock