Multielemental analysis of Mn–Fe nodules by ICP-MS: optimisation of analytical method

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Multielemental analysis of Mn–Fe nodules by ICP-MS: optimisation of analytical method

Axelsson, Mikael D. (author): Luleå tekniska universitet

Rodushkin, Ilya (author): Luleå tekniska universitet,SGAB Analytica, Luleå, Sweden

Ingri, Johan (author): Luleå tekniska universitet,Geovetenskap och miljöteknik

Öhlander, Björn (author): Luleå tekniska universitet

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(creator_code:org_t)

2002
2002
English.
In: The Analyst. - 0003-2654 .- 1364-5528. ; 127:1, s. 76-82

Related links:: https://urn.kb.se/re...; show more...; https://doi.org/10.1...; show less...

Journal article (peer-reviewed)

Abstract Subject headings

Two acid digestion procedures (microwave-assisted and room temperature) were developed for the quantitative analysis of ferromanganese nodules by inductively coupled plasma double focusing sector field mass spectrometry (ICP-SFMS). Different compositions of the acid mixture, dilution factors and corrections for spectral interferences were tested. A combination of nitric, hydrochloric and hydrofluoric acids is necessary for complete sample digestion, with lowest acid to sample ratios (v/m) of 15 and 1.5. respectively, for the last two acids. Sample dilution factors higher than 2 X 104 should be used in order to decrease matrix effects and provide robust long-term instrumental operation. In spite of high dilution. method detection limits in the sub-mug g(-1) range were obtained for 54 out of 71 elements tested. due to the high detection capability of ICP-SFMS, as well as the special care taken to ensure the purity of reagents, to clean the instrument sample introduction system and to minimise sample handling. Owing to the presence of unresolved (at the resolution available) spectral interferences, accurate determination of Au, Hg, Os, Pd, Re and Rh is impossible without matrix separation. The accuracy of the entire analytical method was tested by the analysis of two nodule reference materials. The results generated agreed to within +/-2% for about 10, within +/-10% for more than 40 and within +/-20% for about 50 of 53 elements for which certified, recommended or literature values are available. A precision better than 3%, expressed as the between-digestion relative standard deviation (n=4). was obtained for the majority of elements, except in cases limited by low analyte concentrations

Subject headings

NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geokemi (hsv//swe)
NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geochemistry (hsv//eng)

Keyword

Applied Geology
Tillämpad geologi

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By the author/editor: Axelsson, Mikael ...; Rodushkin, Ilya; Ingri, Johan; Öhlander, Björn

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NATURAL SCIENCES: NATURAL SCIENCES; and Earth and Relate ...; and Geochemistry

Articles in the publication: The Analyst

By the university: Luleå University of Technology

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