Article2007

Characterisation of reference materials by isotope dilution mass spectrometry

93 citations0/0 files storedJournal of Analytical Atomic Spectrometry

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Scientific Measurement and Uncertainty Evaluation Geological and Geochemical Analysis Analytical chemistry methods development

Abstract

This article reviews the application of isotope dilution mass spectrometry (IDMS) to the field of reference material (RM) characterisation within the past 15 years, focusing on elemental and elemental species analysis. Emphasis is placed on liquid and solid RMs and IDMS measurements of the highest analytical quality. Basic principles, as well as the equation system, are being revisited. Different calibration strategies, such as single, double or triple IDMS, are critically reviewed and the achievable uncertainties are discussed. Differences in the application of thermal ionization mass spectrometry (TIMS) and inductively coupled plasma mass spectrometry (ICP-MS) are discussed as well as differences between different types of mass spectrometers, such as single collector versus multi-collector or quadrupole versus magnetic sector instruments. Possible sources of errors and bias are mentioned and correction models introduced and applied within the past years are discussed. Several examples for RM characterisations and inter-laboratory comparisons for elemental as well as elemental species analysis are shown, each demonstrating excellent analytical quality. In general, it can be stated that IDMS is the most important reference method for elemental and elemental species analysis, offering the highest accuracy and precision or smallest measurement uncertainties, when properly applied. Thus, IDMS represents by far the best suited reference method for RM characterisation. Owing to its universal applicability IDMS offers sufficient potential to follow future needs in analytical chemistry as well as in the RM sector.

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References

2003Atomic weights of the elements. Review 2000 (IUPAC Technical Report)2005Certification of a fish otolith reference material in support of quality assurance for trace element analysis 1997Basic equations and uncertainties in isotope-dilution mass spectrometry for traceability to SI of values obtained by this primary method 2006Certification of a new selenized yeast reference material (SELM-1) for methionine, selenomethinone and total selenium content and its use in an intercomparison exercise for quantifying these analytes

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2011Production and Certification of a Unique Set of Isotope and Delta Reference Materials for Boron Isotope Determination in Geochemical, Environmental and Industrial Materials 2011Measurement uncertainty in single, double and triple isotope dilution mass spectrometry 2009Comparison of clinical methods with isotope dilution inductively coupled plasma mass spectrometry for the new standard reference material 955c lead in caprine blood 2008Commonly used methodologies for inorganic analysis in international key comparisons 2009Accurate determination of lead in Chinese herbs using isotope dilution inductively coupled plasma mass spectrometry (ID-ICP-MS)2022Uncertainty evaluation in reference material characterization by double isotope dilution inductively coupled plasma mass spectrometry (ID-ICP-MS)

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