Abstract

AbstractTrace amounts of rare earth elements (REE) were preconcentrated by chemofiltration methods using the organic reagents o‐(3,6‐disulfo‐2‐hydroxy‐1‐naphthylazo)benzenearsonic acid (Thorin) and 2,2′‐(1,8‐dihydroxy‐3,6‐disulfonaphthylene‐2,7‐bisazo)bisbenzenearsonic acid (Arsenazo III) as complexing agents for the REE. The resulting specimens (thin film) were then analyzed by an x‐ray fluorescence method using two different instruments: a conventional x‐ray tube system and a synchrotron radiation source. The results from these two systems were compared with respect to radiation damage, accuracy, detection limits and ease of analysis. Copyright © 2001 John Wiley & Sons, Ltd.

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