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Determination of bismuth(III) by graphite furnace atomic absorption spectrometry combined with liquid-liquid extraction with trioctylmethylammonium nitrate

✍ Scribed by Asako Minagawa; Kiyoshia Sawada; Toshio Suzuki

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 483 KB
Volume: 278
Category: Article
ISSN: 0003-2670
DOI: 10.1016/0003-2670(93)85112-w

No coin nor oath required. For personal study only.

✦ Synopsis

A method for determining traces of bismuth(II1) in environmental samples by graphite furnace atomic absorption spectrometry (GFAAS) after extractive separation with trioctylmethylammonium nitrate (TOMA * NO,) is described. Bismuth(II1) was quantitatively extracted and concentrated with 6% (w/v) TOMA. NO, in xylene from 0.1 M hydrobromic acid-O.5 M nitric acid solution. The organic phase was then washed with 1.0 M nitric acid to remove other co-extracted metal ions, bismuth(II1) remaining quantitatively in xylene solution. Blsmuth(II1) in the organic phase was directly determined by GFAAS. The method was applied to standard reference materials and the results obtained agreed well with the certified values.

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