Application of a dynamic reaction cell (DRC) ICP-MS in chromium and iron determinations in rock, soil and terrestrial water samples

Yasumasa Ogawa, Shin Ichi Yamasaki, Noriyoshi Tsuchiya

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17 Citations (Scopus)

Abstract

Despite environmental and geochemical interests, Cr and Fe have been left beyond the reach of determinations by ICP-MS due to severe interferences originating from Ar. The applicability of a dynamic reaction cell (DRC)-ICP-MS has been examined for determinations in environmental and geochemical samples. The reaction with NH 3 in the DRC system provides an eligible technique to determine Cr, because of a greater improvement in the signal/noise (S/N) ratio due to an effective elimination of interferences arising from Ar (ArC, ArN and ArO), and makes it possible to analyze Cr even at sub-μg L -1 levels. As compared to non-DRC mode analyses, the DRC technique using m/z 56 appeared to be preferable for Fe determination in most terrestrial waters because of effective suppression of 40 Ar 16 O + . In addition, the effects of cluster ions, such as 39 K 14 N 1 H 3 + and 40 Ca 14 N 1 H 2 + , on Fe determination were also negligibly small. Measurements using 54 Fe by the DRC mode are also advantageous for Ca-rich samples, such as limestone and dolomite. 2010

Original languageEnglish
Pages (from-to)867-872
Number of pages6
Journalanalytical sciences
Volume26
Issue number8
DOIs
Publication statusPublished - 2010 Aug

ASJC Scopus subject areas

  • Analytical Chemistry

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