Large Aliquot Injection Approach in the Electrothermal AAS Determination of Arsenic in Environmental Water Samples.

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  • IMAI Shoji
    Department of Chemistry, Faculty of Integrated Arts and Sciences, The University of Tokushima
  • FUJIKAWA Kenichiro
    Department of Chemistry, Faculty of Integrated Arts and Sciences, The University of Tokushima
  • YONETANI Akira
    Hitachi Instruments Engineering Co. Ltd.
  • OGAWA Nobuaki
    Department of Materials-process Engineering & Applied Chemistry for Environment, Faculty of Engineering and Resource Science, Akita University
  • KIKUCHI Yoichi
    Department of Chemistry, Faculty of Education, Iwate University

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説明

Determination of As by direct electrothermal atomization atomic absorption spectrometry with a pyropytically-coated graphite furnace treated with W by a single drop treatment technique was reported. The treated PG furnace made it possible to introduce a 100 µl aliquot of sample solution into the furnace with a high precision (RSD <4%). Use of a Pd-modifier made it possible to enhance the precision (RSD <3%) and the sensitivity. A good linearity (correlation factor >0.99) between integrated absorbance and injection volume was observed in the range 0 - 100 µl. The calculated detection limit and characteristic mass (sensitivity) for integrated absorbance were 22 ng l-1 and 16 pg and for maximum absorbance were 45 ng l-1 and 13 pg for a 100 µl injection with the Pd modifier at the optimum ashing temperature of 800°C. An interference study for environmental matrices was also carried out. The recoveries of 2 and/or 4 µg l-1 of As added to various water samples, such as snow, cloud, river and tap waters, were 97 - 104%.

収録刊行物

  • Analytical Sciences

    Analytical Sciences 16 (2), 163-167, 2000

    社団法人 日本分析化学会

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