Precise estimation of emission intensity of alloyed elements in steel by using internal standard line in glow discharge optical emission spectrometry

Hyunkook Park, Kazuaki Wagatsuma

Research output: Contribution to journalArticlepeer-review

Abstract

Precision in the emission intensity measurement of alloyed elements in steel is investigated when an emission line of iron is employed as an internal standard in d.c. glow discharge optical emission spectrometry. Long-term variations in their emission intensities can be well corrected using the internal standard of the iron emission line, probably because the fluctuation in the sputtering rate of samples is a major reason for their intensity variations. For instance, in an Fe-Cr alloy sample (Cr0.50 mass%), the relative standard deviation (RSD) of the emission intensity of CrI 425.433 nm is 0.678% with the internal standard method whereas the RSD is 2.14% without the internal standard. Also, daily variations in calibration curves are much suppressed by using the internal standard line. For instance, in Fe-V alloy samples, the RSDs of the calibration factor for vanadium analytical lines are 1.10-1.84%, which means that a re-calibration procedure is hardly needed for the analytical application. The internal standard method contributes to the precise determination of minor alloyed elements in steel samples.

Original languageEnglish
Pages (from-to)54-58
Number of pages5
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume92
Issue number7
DOIs
Publication statusPublished - 2006 Jul

Keywords

  • Glow discharge optical emission spectrometry
  • Internal standard
  • Minor alloyed elements
  • Precision
  • Steel

ASJC Scopus subject areas

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

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