Atomization Mechanism of Silver Deposited on Pyrolyzed Ascorbic Acid in Graphite Furnace Atomic Absorption Spectrometry

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  • ITOH Tatsuya
    Department of Chemistry, Joetsu University of Education
  • SHIMOMURA Hiroshi
    Department of Chemistry, Joetsu University of Education
  • NISHIYAMA Yasuko
    Department of Chemistry, Joetsu University of Education
  • IMAI Shoji
    Department of Chemistry, Faculty of Integrated Arts and Sciences, The University of Tokushima

Bibliographic Information

Other Title
  • 黒鉛炉原子吸光法におけるアスコルビン酸灰化生成物上に分散した銀の原子化機構
  • コクエンロ ゲンシ キュウコウホウ ニ オケル アスコルビンサン ハイカ セイセイ ブツジョウ ニ ブンサン シタ ギン ノ ゲンシカ キコウ

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Abstract

The atomization of 0.2 ng Ag deposited on ascorbic acid pyrolysed at various temperatures was observed and the activation parameters were estimated. The mass of Ag and the pyrolysis conditions were selected to form droplets without any dispersion on a PG wall and active carbon. The kinetic order obtained indicated the formation of Ag aggregates on the active carbon at temperatures below 1560 K and the formation of individually dispersed atoms of Ag on that at temperatures over 1700 K. The degree of interaction between the Ag atom and an active site on the high temperature treated active carbon was increased, resulting from their greater interaction.<br>

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 54 (7), 621-626, 2005

    The Japan Society for Analytical Chemistry

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