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Title
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Co-precipitation with iron hydroxide and X-ray fluorescence analysis of trace metals in water
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Author
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Abstract
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| 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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Language
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English
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Source (journal)
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International journal of environmental analytical chemistry. - New York, N.Y.
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Publication
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New York, N.Y.
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1982
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ISSN
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0306-7319
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DOI
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10.1080/03067318208071563
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Volume/pages
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11
:1
(1982)
, p. 67-80
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ISI
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A1982NG99200007
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Full text (Publisher's DOI)
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