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Comparative Study of Chemical Interferences of Calcium in Atomic Absorption and Flame Emission Spectrometry

  • Jae Y. Hwang
  • Keiichiro Fuwa
Part of the Developments in Applied Spectroscopy book series (DAIS, volume 9)

Abstract

Comparative observations on the degrees of the chemical interferences of calcium are presented for atomic absorption and flame emission spectrometry. In order to compare both methods on an equal footing the calcium resonance line at 422.7 nm was used under the identical flame conditions. Chemical interferences of calcium from sodium, iron, aluminum, sulfate, phosphate, nitrate, chloride, and silicate were interpreted in terms of burner height and flame condition. A similar study was made on a second resonance line at 239.9 nm and on the molecular band heads near 554.0 and 628.0 nm, respectively.

The results not only refute the claim that flame emission spectrometry is more susceptible to the chemical interferences than atomic absorption spectrometry, but also show that the depression effects of the interferents on the calcium lines studied are similar to the effects on the calcium molecular band heads. The data also show that the chemical interferences decrease as the flames become leaner and as the burner height increases. Behaviour of a releasing and protective agent is discussed in terms of the burner height and stoichiometry of the flames.

Keywords

Resonance Line Flame Temperature EDTA Solution Residenee Time Turbulent Flame 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chicago Section of the Society for Applied Spectroscopy 1971

Authors and Affiliations

  • Jae Y. Hwang
    • 1
  • Keiichiro Fuwa
    • 2
  1. 1.Applications LaboratoryInstrumentation Laboratory Inc.LexingtonUSA
  2. 2.Department of Agricultural ChemistryUniversity of TokyoBunkyo-ku, TokyoJapan

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