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N. M. Sorokina, G. I. Tsysin

X-ray fluorescence determination of lanthanum, cerium, praseodymium and neodymium in technological solutions after preconcentration using cellulose DETATA-filters

Abstract

Sorption of some rare earth elements was studied on filters with bound DETATA-groups. It was shown that these elements are quantitatiuvely recovered from solutions at pH 3.55.5 and sample flow rate 1-8 ml/min from 20500 ml of sample. For recovery of elements from solutions containing iron, we have proposed to use masking reagents sulfosalicylic acid and 1,10-phenantroline. Elements were determined directly on filters by X-ray fluorescence spectroscopy. Calibration dependencies are linear in concentration range 2100 g/filter of each REE. Limits of detection for La, Ce, Pr and Nd, calculated according 3s-criterion, were 0,03; 0,03; 0,01 and 0,01 g/ml respectively when extraction was performed from 100 ml of sample.
Key words: rare earth elements, filters-sorbents, determination, X-ray fluorescence method, technological solutions.
Moscow University Chemistry Bulletin.
2016, Vol. 57, No. 3, P. 167
   

Copyright (C) Chemistry Dept., Moscow State University, 2002
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