Title
Determination of vanadium, molybdenum and tungsten in chloralkali electrolysis brines by x-ray fluorescence spectrometry
Author
Faculty/Department
Faculty of Sciences. Chemistry
Publication type
article
Publication
Amsterdam ,
Subject
Chemistry
Source (journal)
Analytica chimica acta. - Amsterdam
Volume/pages
128(1981) , p. 207-212
ISSN
0003-2670
ISI
A1981LX40500023
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
The levels of vanadium, molybdenum and tungsten are critical in chloralkali electrolysis brines because these elements catalyze the hydrogen-producing side-reaction. Preconcentration by chelation with 8-quinolinol and subsequent adsorption on activated carbon, can be combined with energy- or wavelength-dispersive x-ray fluorescence. Under optimized conditions, the detection limits are in the μg 1-1 range, and below the critical levels. Up to 100 /smg l-1, reliable results are obtained for V, Mo and W. The coefficient of variation is typically 15% in the 25100 μg l-1 range.
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