Graphite furnace atomic absorption spectrometric determination of bismuth(III) after coprecipitation with hafnium hydroxide.

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概要

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• A method for the coprecipitation of bismuth(III) with hafnium hydroxide followed by a graphite-furnace atomic absorption spectrometric determination is described. Hafnium hydroxide coprecipitates quantitatively 0.05–3 μg of bismuth(III) from 50–400 cm<SUP>3</SUP> of sample solution at pH 5.8–11.2. The presence of 2.5–50 mg of hafnium in 25 cm<SUP>3</SUP> does not affect the atomic absorbance of bismuth(III). The calibration curve is linear for 0.05–3 μg of bismuth(III) in 25 cm<SUP>3</SUP> and passes through the origin. Interference from the presence of large amounts of silver can be eliminated by removing silver as the ammine complex produced by the coprecipitation procedure at above pH 11 with aqueous ammonia. Several other matrix ions investigated do not interfere with the determination in at least a 500-fold mass ratio to bismuth(III). This method was successfully applied to the determination of trace bismuth(III) in commercial metal silver (purity: 99.99%), and is also applicable to the determination of trace amounts of bismuth(III) in water sample.

• 公益社団法人 日本化学会の論文

著者

• Ueda Joichi

  Department Of Chemistry Faculty Of Education Kanazawa University

• Takagi Midori

  Department of Chemistry, Faculty of Education, Kanazawa University

関連論文

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• Preconcentration of Trace Metal Ions by Coprecipitation with Gallium Phosphate for Flameless Atomic Absorption Spectrometry
• Spectrophotometric determination of palladium and bismuth(III) with semimethylxylenol blue.
• Graphite furnace atomic absorption spectrometric determination of bismuth(III) after coprecipitation with hafnium hydroxide.

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