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Determination of Trace Gallium by Electrothermal Atomic Absorption Spectrometry after Preconcentration on a Membrane Filter with a Finely Pulverized Anion-Exchange Resin

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Abstract

A sensitive method based on preconcentration on a membrane filter with a finely pulverized anion-exchange resin has been developed for the determination of gallium in water samples by electrothermal atomic absorption spectrometry. Gallium (10-60) ng, in 20 - 500 ml of a sample solution, was retained as a Pyrocatechol Violet complex anion on a resin at pH 5; the resulting resin was filtered through a membrane filter. A portion of the resin with the membrane filter (3 mm in diameter) was inserted into a cuvette, and the absorbance of gallium was measured at 294.4 nm. The relative standard deviations for five measurements at 30 ng of gallium was 5%. The detection limit was 1.5 ng of gallium in 500 ml (3 ngGa l-1) of the water sample. The interference of various ions was studied, and the optimum conditions were developed for the determination of gallium in mine-drainage and river-water samples.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Faculty of Engineering, Yamagata University, Yonezawa, 992, Japan

    Junichi Shida & Shinichi Matsuzaki

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  1. Junichi Shida
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  2. Shinichi Matsuzaki
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Shida, J., Matsuzaki, S. Determination of Trace Gallium by Electrothermal Atomic Absorption Spectrometry after Preconcentration on a Membrane Filter with a Finely Pulverized Anion-Exchange Resin. ANAL. SCI. 13, 41–45 (1997). https://doi.org/10.2116/analsci.13.41

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  • DOI: https://doi.org/10.2116/analsci.13.41

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