Analytical performance of argon spark discharge plasma under reduced pressures

Shuya Nakamura, Kazuaki Wagatsuma

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


The emission intensities, the signal-to-background ratios (SBR), and the relative standard deviations (RSD) for Cu I 324.75 nm and Cu II 224.70 nm were measured in spark discharge optical emission spectrometry (SD-OES) when the argon plasma was operated under reduced pressures. The SBRs increase with decreasing argon pressures, yielding about 4-times larger values compared to those in the ambient-pressure condition. In these cases, the RSDs are less altered at argon pressures of 10-40kPa. The reason for this effect is that the background intensities are drastically reduced because the continuum by electron collisions decreases under the reduced-pressure conditions. The reduced-pressure argon plasma would contribute to the improvement in the analytical performance in SD-OES.

Original languageEnglish
Pages (from-to)490-494
Number of pages5
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Issue number8
Publication statusPublished - 2006 Aug


  • Argon
  • Copper
  • Low-pressure spark plasma
  • Signal-to-background ratio
  • Signal-to-noise ratio
  • Spark discharge optical emission spectrometry

ASJC Scopus subject areas

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


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