Improvement of the detection limits in radio-frequency-powered glow discharge optical emission spectrometry associated with bias-current conduction method

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21 Citations (Scopus)

Abstract

A d.c. bias current driven by the self-bias voltage which is conducted through the r.f.-powered glow discharge plasma varies the emission characteristics drastically, leading to improvement of the detection power in the optical emission spectrometry. By conducting the bias currents of 20-30 mA, the emission intensities of the atomic resonance lines were 10-20 times larger than those obtained with conventional r.f.-powered plasmas. The detection limits for determination of alloyed elements in the Fe-based binary alloy samples were estimated to be 1.6×10-3% Cr for CrI 425.43 nm, 7×10-4% Mn for MnI 403.10 nm, 1.9×10-3% Cu for CuI 327.40 nm, 1.1×10-3% Al for AlI 396.16 nm, and 6.6×10-3% Ni for NiI 352.45 nm.

Original languageEnglish
Pages (from-to)34-38
Number of pages5
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume85
Issue number1
DOIs
Publication statusPublished - 1999

ASJC Scopus subject areas

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

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