Extraction with long-chain amines-VIII Extraction of the chromium-DCTA complex and its colorimetric determination.
Chromium(III) is extracted as the DCTA complex by ion-association with trioctylmethylammonium chloride (Aliquat 336-S), into chloroform, and stripped into 1M potassium nitrate for spectrophotometric measurement at 540 nm. Iron(III) copper(II) are removed beforehand by extraction whith phenylacetic acid. High concentrations of nickel or cobalt prevent complete extraction.
Adam
J
J
Analytical Laboratory Institute of Geological Sciences Charles University Prague, Czechoslovakia.
Pribil
R
R