Collect. Czech. Chem. Commun. 1993, 58, 1495-1508

The Spectrophotometric Determination of Elements with Chromazurol S in the Presence of Cetyltrimethylammonium Bromide and Triton X-100. I. The Determination of the Sum of the Rare Earth Elements

Jan Preisler, Luděk Jančář and Lumír Sommer

Department of Analytical Chemistry, Masaryk University, 611 37 Brno, Czech Republic


The study of the interactions of the rare earth elements (REE) with chromazurol S in the presence of a cationic and noncationic tenside permitted a number of general conclusions to be drawn for the effect of tensides on the chromogenic analytical reaction. The ternary ion associate with chromazurol S and cetyl trimethyl ammonia in the presence of Triton-100 is useful for the sensitive spectrophotometric determination of REE in mixtures and in hydroxide concentrates.