Analytical performance of glow discharge optical emission spectrometry with neon-argon mixed gases in determination of aluminum in steel samples

Kazuaki Wagatsuma, Park Hyunkook

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The emission characteristics of several atomic and ionic line of Al emitted from a Ne-Ar mixed gas glow discharge plasma were investigated. In comparison with pure Ar and pure Ne plasmas, the relative intensities of the Al emission lines are much different among these plasma gases. The Al II lines which are identified to the 4f-3d transitions, such as Al II 358.71 nm and Al II 358.66 nm, give intense emission when Ne is employed as the plasma gas, whereas these Al II lines cannot be emitted from the pure Ar plasma. The reason for this effect is that the 4f excited levels are highly and selectively populated through resonance charge transfer collision between Al atom and Ne ion. The addition of small amounts of Ar to the Ne plasma increases the population of gas ions as well as the number density of electrons in the plasma because Ar ions are predominantly produced through Penning ionization collision between Ne metastable and Ar atom. This change occurring in the Ne-Ar mixed gas plasma results in enhancement in the emission intensities of Al lines. Among the atomic and ionic Al lines, the Al II 358.641 nm line can be employed as an analytical line for determination of trace-level Al, since the intensity is large and the background equivalent concentration is small in the Ne-Ar plasma.

Original languageEnglish
Pages (from-to)1-7
Number of pages7
JournalYejin Fenxi/Metallurgical Analysis
Volume27
Issue number7
Publication statusPublished - 2007 Jul 1

Keywords

  • Aluminum
  • Charge transfer collision
  • Glow discharge optical emission spectrometry
  • Ne-Ar mixed gas
  • Penning ionization
  • Steel

ASJC Scopus subject areas

  • Metals and Alloys
  • Materials Chemistry

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