Title
Co-precipitation with iron hydroxide and X-ray fluorescence analysis of trace metals in water
Author
Faculty/Department
Faculty of Sciences. Chemistry
Publication type
article
Publication
New York, N.Y. ,
Subject
Chemistry
Source (journal)
International journal of environmental analytical chemistry. - New York, N.Y.
Volume/pages
11(1982) :1 , p. 67-80
ISSN
0306-7319
ISI
A1982NG99200007
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Preconcentration of transition trace ions by coprecipitation on iron-hydroxide has been combined with energy-dispersive X-ray fluorescence for environmental water analysis. The optimized preconcentration procedure implies adding 2 mg of iron to a 200 ml water sample, adding dilute NaOH up to pH 9, filtering off on a Nuclepore membrane after a 1 h equilibration time, and analyzing. Quantitative recoveries could then be obtained for Ni, Cu, Zn and Pb, e.g. at the 10 μg/l level in waters of varying salinity while Mn was partially collected. (In fact, for a given problem the iron carrier amount can be adjusted to obtain a satisfactory compromise between high recovery and low detection limit). The precision is 7-8% at the 10 μg/l level, and the detection limits are in the 0.5-1 μg/l range. Various environmental water samples are analysed by way of illustration.
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