Determination of trace amounts of Mn, Al, Si and Cr in Fe-based alloys by radio-frequency-powered glow-discharge optical emission spectrometry associated with the bias-current conduction method

Toru Fujimura, Akira Yamamoto, Kazuaki Wagatsuma

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

In an r.f. glow-discharge plasma, a d.c. bias current can be introduced by connecting an electric circuit comprising a low-pass filter and a variable resistor. The bias current promotes the emission excitations in the plasma, leading to an improvement of the detection power in the optical-emission spectrometry. By conducting a bias current of 27 mA, the emission intensities of the atomic resonance lines were several-times larger than those obtained with conventional r.f.-powered plasmas. The detection limits for the determination of alloyed elements in Fe-based low-alloyed standard samples were estimated to be 2 ppm Mn for Mn I 403.08 nm, 2 ppm Al for Al I 396.15 nm, 7 ppm Si for Si I 288.158 nm, and 8 ppm Cr for Cr I 425.43 nm.

Original languageEnglish
Pages (from-to)445-448
Number of pages4
JournalBUNSEKI KAGAKU
Volume53
Issue number5
DOIs
Publication statusPublished - 2004 May

Keywords

  • Conduction of a d.c. bias current
  • Detection limit
  • Optical emission spectrometry
  • Radio frequency-powered glow discharge plasma
  • Self-bias voltage

ASJC Scopus subject areas

  • Analytical Chemistry

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