Routine isotopic analysis of iron by HR-MC-ICPMS: How precise and how accurate?

Nicolas Dauphas; Ali Pourmand; Fang Zhen Teng

doi:10.1016/j.chemgeo.2008.12.011

Routine isotopic analysis of iron by HR-MC-ICPMS: How precise and how accurate?

Nicolas Dauphas, Ali Pourmand, Fang Zhen Teng

Research output: Contribution to journal › Article

113 Scopus citations

Abstract

High-temperature isotopic variations documented in natural materials span a narrow range and call for precise and accurate isotopic analyses. Precisions better than ~ 0.03‰ (95% confidence interval) for δ⁵⁶Fe have been obtained by High-Resolution Multi-Collector Inductively Coupled Plasma Mass Spectrometry (HR-MC-ICPMS). Whether these uncertainties encompass all sources of error has not been carefully evaluated. The current study examines all parameters that can affect accuracy and precision of Fe isotopic measurements by HR-MC-ICPMS. It is demonstrated that accurate δ⁵⁶Fe measurements can be routinely achieved within the quoted uncertainties.

Original language	English (US)
Pages (from-to)	175-184
Number of pages	10
Journal	Chemical Geology
Volume	267
Issue number	3-4
DOIs	https://doi.org/10.1016/j.chemgeo.2008.12.011
State	Published - Sep 30 2009
Externally published	Yes

Keywords

Accuracy
Chromatography
HR-MC-ICPMS
Iron isotopes
Precision

ASJC Scopus subject areas

Geology
Geochemistry and Petrology

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10.1016/j.chemgeo.2008.12.011

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Dauphas, N., Pourmand, A., & Teng, F. Z. (2009). Routine isotopic analysis of iron by HR-MC-ICPMS: How precise and how accurate? Chemical Geology, 267(3-4), 175-184. https://doi.org/10.1016/j.chemgeo.2008.12.011

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abstract = "High-temperature isotopic variations documented in natural materials span a narrow range and call for precise and accurate isotopic analyses. Precisions better than ~ 0.03‰ (95% confidence interval) for δ56Fe have been obtained by High-Resolution Multi-Collector Inductively Coupled Plasma Mass Spectrometry (HR-MC-ICPMS). Whether these uncertainties encompass all sources of error has not been carefully evaluated. The current study examines all parameters that can affect accuracy and precision of Fe isotopic measurements by HR-MC-ICPMS. It is demonstrated that accurate δ56Fe measurements can be routinely achieved within the quoted uncertainties.",

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