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Analytical developments at the Potsdam SIMS user facility and the metrological limits on in situ isotope ratio data

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/persons/resource/mariro

Scicchitano,  Maria Rosa       
3.1 Inorganic and Isotope Geochemistry, 3.0 Geochemistry, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
GFZ SIMS Publications, GFZ Helmholtz Centre for Geosciences;

/persons/resource/michawi

Wiedenbeck,  Michael
3.1 Inorganic and Isotope Geochemistry, 3.0 Geochemistry, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
GFZ SIMS Publications, GFZ Helmholtz Centre for Geosciences;

/persons/resource/couffig

Couffignal,  F.
3.1 Inorganic and Isotope Geochemistry, 3.0 Geochemistry, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
GFZ SIMS Publications, GFZ Helmholtz Centre for Geosciences;

/persons/resource/sarahg

Glynn,  S.
3.1 Inorganic and Isotope Geochemistry, 3.0 Geochemistry, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
GFZ SIMS Publications, GFZ Helmholtz Centre for Geosciences;

/persons/resource/agiera

Wudarska,  Alicja       
3.1 Inorganic and Isotope Geochemistry, 3.0 Geochemistry, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
GFZ SIMS Publications, GFZ Helmholtz Centre for Geosciences;

/persons/resource/bobby

Trumbull,  R.       
3.1 Inorganic and Isotope Geochemistry, 3.0 Geochemistry, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
GFZ SIMS Publications, GFZ Helmholtz Centre for Geosciences;

/persons/resource/rocholl

Rocholl,  Alexander       
3.1 Inorganic and Isotope Geochemistry, 3.0 Geochemistry, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
GFZ SIMS Publications, GFZ Helmholtz Centre for Geosciences;

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Scicchitano, M. R., Wiedenbeck, M., Couffignal, F., Glynn, S., Wudarska, A., Trumbull, R., Rocholl, A. (2023): Analytical developments at the Potsdam SIMS user facility and the metrological limits on in situ isotope ratio data - Abstracts, EGU General Assembly 2023 (Vienna, Austria 2023).
https://doi.org/10.5194/egusphere-egu23-1220


???ViewItemOverview_lblCiteAs???: https://gfzpublic.gfz.de/pubman/item/item_5015644
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The German Research Centre for Geosciences (GFZ) in Potsdam hosts a CAMECA 1280-HR large geometry secondary ion mass spectrometer (SIMS) with a web-based user node at the University of the Witwatersrand, South Africa. A major theme of our facility is high-precision, high-accuracy, high-spatial resolution analyses of light isotope ratios in a variety of natural and experimental materials.

The latest analytical developments from the GFZ SIMS laboratory focus on the development, assessment and use of new reference materials for stable isotope analysis. Particularly for oxygen, our repeatability from 15-µm diameter domains is now typically better than ±0.15‰ (1s). However, the total uncertainty on such analyses is commonly larger because of significant differences (in some cases more than one ‰) among the isotope ratios of reference materials reported by multiple, highly regarded gas source mass spectrometry laboratories. This issue of interlaboratory bias during reference material characterization inevitably impacts all in situ data employing such materials and must be duly considered.