Determination of Ytterbium in Seawater by Graphite Furnace Atomic Absorption Spectrometry after Coprecipitation and Solvent Extraction

Osamu FUJINO; Sino NISHIDA; Hideo TOGAWA; Keizo HIRAKI

doi:10.2116/analsci.7.889

Osamu FUJINO, Sino NISHIDA, Hideo TOGAWA, Keizo HIRAKI

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Keywords: Ytterbium, graphite furnace atomic absorption spectrometry, seawater, coprecipitation, solvent extraction

JOURNAL FREE ACCESS

1991 Volume 7 Issue 6 Pages 889-892

DOI https://doi.org/10.2116/analsci.7.889

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Abstract

Trace amounts of ytterbium in seawater were coprecipitated with iron(III) hydroxide, and the precipitate was dissolved in 2ml of 8mol/dm³ hydrochloric acid. Iron(III) ions were removed by extraction with 2, 6-dimethyl-4-heptanone, and a 20-μl aliquot of the aqueous phase was directly injected into a graphite furnace atomizer. Ytterbium in seawater was found to be (0.62-1.35)×10^-9g/l.

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