Effect of chloride ion on lead signal appearance in the co-existence of iron in electrothermal graphite furnace atomic absorption spectrometry.

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概要

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• The atomic absorption signals for lead were measured in various chloride matrices at a charring temperature of 700 K. A typical double-peak signal was observed with iron(III) chloride, while a single peak was observed with iron(III) nitrate. At a charring temperature of 1440 K, the first peak disappeared and only the second peak remained; the atomization temperature of the latter was in agreement with that in the iron matrix. The larger content of the chloride ion increased the first peak absorption and decreased the second peak absorption without any shift of the peak temperatures, showing that one species for the second peak was converted to the same species for the first peak by the addition of a chloride ion. The appearance temperature of the first peak signal in the X<SUP>−</SUP>–Fe<SUP>3+</SUP> matrix system increased in the order Cl<SUP>−</SUP><Br<SUP>−</SUP><I<SUP>−</SUP>. It was concluded that the appearance of the first peak is caused by the dissociation of lead halide.

• 公益社団法人 日本化学会の論文

著者

• Hayashi Yasuhisa

  Department Of Chemistry Faculty Of Science Hiroshima University

• Nishiyama Yasuko

  Department Of Chemistry Joetsu University Of Education

• IMAI Shoji

  Department of Biomedical Information, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University

• Ichinoseki Masayoshi

  Department of Chemistry, Joetsu University of Education

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