Emission characteristics of okamoto-cavity microwave-induced plasma in direct introduction of organic solvents and the application to the analysis of MIBK extract from iron-matrix samples

Tetsuo Maeda, Kazuaki Wagatsuma

Research output: Contribution to journalReview articlepeer-review

4 Citations (Scopus)

Abstract

An Okamoto-cavity microwave-induced plasma (MIP) with a nitrogen-oxygen gas mixture was employed as an atomization and excitation source for emission analysis when organic solvent samples were directly aspirated The mixed gas plasmas could be maintained with a high robustness against the loading of organic solvents such as ethanol and 4-methyl-2-pentanone (MIBK). Also, the introduction of the organic solvents exerted little influence on the emission characteristics of the plasma; the atomic-to-atomic and the ionic-to-atomic intensity ratios of various emission lines were a little varied by introducing organic solutions containing different concentrations of ethanol. This is probably because the organic solvent can be easily removed due to reactions with active oxygen species in the MIR After test solutions containing Al, Co, Cr(III), Cu, Fe(III), Mo(VI), Ni, and Pb were extracted with MIBK, both the aqueous phase and the organic phase were aspirated into the plasma, giving calibration curves having good linearity, either from the aqueous phase for Al, Co, Cr, Ni, and Pb or from the organic phase for Fe and Mo. This effect can be explained from the partition coefficients of these elements between in MIBK and in water.

Original languageEnglish
Pages (from-to)35-41
Number of pages7
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume91
Issue number5
DOIs
Publication statusPublished - 2005 May

Keywords

  • Direct loading of ethanol
  • Emission characteristics
  • MIBK extraction
  • Microwave induced plasma
  • Okamoto cavity
  • Optical emission spectrometry

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

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