Development of an iron internal standard method using a molecular beam of phosphorus oxide for determination of nickel in steel samples by continuous source flame atomic absorption spectrometry

Kenichi Nakayama, Kazuaki Wagatsuma

Research output: Contribution to journalComment/debatepeer-review

Abstract

This paper suggests an improved internal standard method for the flame atomic absorption spectrometry of nickel in a steel sample. The variation of iron absorption was greatly compatible to that of nickel, and then iron-matching calibration standard solutions were conventionally required for precise analytical results. To correct for a varied concentration of iron in a sample solution, phosphoric acid was added into the solution. The absorption caused by phosphorus oxide was simultaneously measured with the absorptions of nickel and iron by using an atomic absorption spectrometer equipped with a continuous light source and an echelle grating system. The improved method was used to quantify nickel in several steel samples containing about 85 to 98 mass% of iron.

Original languageEnglish
Pages (from-to)219-223
Number of pages5
JournalBUNSEKI KAGAKU
Volume69
Issue number4.5
DOIs
Publication statusPublished - 2020

Keywords

  • Flame atomic absorption analysis
  • Internal standard
  • Matrix matching
  • Molecular absorption
  • Phosphorus oxide

ASJC Scopus subject areas

  • Analytical Chemistry

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