Automatic spectrolfluorimetric method for the determination of dysprosium as its ternary complex with EDTA and Tiron

The automatic method is based on the ternary complex formed with EDTA and Tiron. The method is satisfactory or quantifying 0.1–1.2 μg ml^?1 dysprosium under conditions similar to those used for terbium. The effect of other lanthanides, yttrium, thorium, and dioxouranium(VI) on the fluorescence intensity is described; the main interference is from terbium(III).