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The performance of single and multi-collector ICP-MS instruments for fast and reliable (34)S/(32)S isotope ratio measurements†

The performance and validation characteristics of different single collector inductively coupled plasma mass spectrometers based on different technical principles (ICP-SFMS, ICP-QMS in reaction and collision modes, and ICP-MS/MS) were evaluated in comparison to the performance of MC ICP-MS for fast...

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Autores principales: Hanousek, Ondrej, Brunner, Marion, Pröfrock, Daniel, Irrgeher, Johanna, Prohaska, Thomas
Formato: Online Artículo Texto
Lenguaje:English
Publicado: 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5087850/
https://www.ncbi.nlm.nih.gov/pubmed/27812369
http://dx.doi.org/10.1039/C6AY02177H
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author Hanousek, Ondrej
Brunner, Marion
Pröfrock, Daniel
Irrgeher, Johanna
Prohaska, Thomas
author_facet Hanousek, Ondrej
Brunner, Marion
Pröfrock, Daniel
Irrgeher, Johanna
Prohaska, Thomas
author_sort Hanousek, Ondrej
collection PubMed
description The performance and validation characteristics of different single collector inductively coupled plasma mass spectrometers based on different technical principles (ICP-SFMS, ICP-QMS in reaction and collision modes, and ICP-MS/MS) were evaluated in comparison to the performance of MC ICP-MS for fast and reliable S isotope ratio measurements. The validation included the determination of LOD, BEC, measurement repeatability, within-lab reproducibility and deviation from certified values as well as a study on instrumental isotopic fractionation (IIF) and the calculation of the combined standard measurement uncertainty. Different approaches of correction for IIF applying external intra-elemental IIF correction (aka standard-sample bracketing) using certified S reference materials and internal inter-elemental IIF (aka internal standardization) correction using Si isotope ratios in MC ICP-MS are explained and compared. The resulting combined standard uncertainties of examined ICP-QMS systems were not better than 0.3–0.5% (u(c,rel)), which is in general insufficient to differentiate natural S isotope variations. Although the performance of the single collector ICP-SFMS is better (single measurement u(c,rel) = 0.08%), the measurement reproducibility (>0.2%) is the major limit of this system and leaves room for improvement. MC ICP-MS operated in the edge mass resolution mode, applying bracketing for correction of IIF, provided isotope ratio values with the highest quality (relative combined measurement uncertainty: 0.02%; deviation from the certified value: <0.002%).
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spelling pubmed-50878502016-11-14 The performance of single and multi-collector ICP-MS instruments for fast and reliable (34)S/(32)S isotope ratio measurements† Hanousek, Ondrej Brunner, Marion Pröfrock, Daniel Irrgeher, Johanna Prohaska, Thomas Anal Methods Article The performance and validation characteristics of different single collector inductively coupled plasma mass spectrometers based on different technical principles (ICP-SFMS, ICP-QMS in reaction and collision modes, and ICP-MS/MS) were evaluated in comparison to the performance of MC ICP-MS for fast and reliable S isotope ratio measurements. The validation included the determination of LOD, BEC, measurement repeatability, within-lab reproducibility and deviation from certified values as well as a study on instrumental isotopic fractionation (IIF) and the calculation of the combined standard measurement uncertainty. Different approaches of correction for IIF applying external intra-elemental IIF correction (aka standard-sample bracketing) using certified S reference materials and internal inter-elemental IIF (aka internal standardization) correction using Si isotope ratios in MC ICP-MS are explained and compared. The resulting combined standard uncertainties of examined ICP-QMS systems were not better than 0.3–0.5% (u(c,rel)), which is in general insufficient to differentiate natural S isotope variations. Although the performance of the single collector ICP-SFMS is better (single measurement u(c,rel) = 0.08%), the measurement reproducibility (>0.2%) is the major limit of this system and leaves room for improvement. MC ICP-MS operated in the edge mass resolution mode, applying bracketing for correction of IIF, provided isotope ratio values with the highest quality (relative combined measurement uncertainty: 0.02%; deviation from the certified value: <0.002%). 2016-09-23 2016-11-14 /pmc/articles/PMC5087850/ /pubmed/27812369 http://dx.doi.org/10.1039/C6AY02177H Text en http://creativecommons.org/licenses/by/3.0/ This article is licensed under a Creative Commons Attribution 3.0 Unported Licence (http://creativecommons.org/licenses/by/3.0/) .
spellingShingle Article
Hanousek, Ondrej
Brunner, Marion
Pröfrock, Daniel
Irrgeher, Johanna
Prohaska, Thomas
The performance of single and multi-collector ICP-MS instruments for fast and reliable (34)S/(32)S isotope ratio measurements†
title The performance of single and multi-collector ICP-MS instruments for fast and reliable (34)S/(32)S isotope ratio measurements†
title_full The performance of single and multi-collector ICP-MS instruments for fast and reliable (34)S/(32)S isotope ratio measurements†
title_fullStr The performance of single and multi-collector ICP-MS instruments for fast and reliable (34)S/(32)S isotope ratio measurements†
title_full_unstemmed The performance of single and multi-collector ICP-MS instruments for fast and reliable (34)S/(32)S isotope ratio measurements†
title_short The performance of single and multi-collector ICP-MS instruments for fast and reliable (34)S/(32)S isotope ratio measurements†
title_sort performance of single and multi-collector icp-ms instruments for fast and reliable (34)s/(32)s isotope ratio measurements†
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5087850/
https://www.ncbi.nlm.nih.gov/pubmed/27812369
http://dx.doi.org/10.1039/C6AY02177H
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