A coherent method for combined stable magnesium and radiogenic strontium isotope analyses in carbonates (with application to geological reference materials SARM 40, SARM 43, SRM 88A, SRM 1B)
| Autor: | Martin Dietzel, Oliver Nebel, Dorothee Hippler, Jessica Alexandra Stammeier |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Clinical Biochemistry
chemistry.chemical_element 010501 environmental sciences engineering.material 01 natural sciences Certified carbonate-bearing reference material 03 medical and health sciences chemistry.chemical_compound Chemical separation MC-ICP-MS lcsh:Science 030304 developmental biology 0105 earth and related environmental sciences 0303 health sciences Radiogenic nuclide Olivine Isotope Chemistry Magnesium Radiochemistry Radiogenic Sr Isotopes of strontium Medical Laboratory Technology Certified reference materials engineering Carbonate Mg isotopes lcsh:Q Earth and Planetary Science Leaching (metallurgy) |
| Zdroj: | MethodsX, Vol 7, Iss, Pp 100847-(2020) MethodsX |
| ISSN: | 2215-0161 |
| Popis: | We undertook 87Sr/86Sr analyses for a range of carbonate bearing geological reference materials, and combined these with δ26Mg for a subset of samples. Following chemical purification in a series of chromatographic extractions, isotope ratios were measured by Multi-Collector-ICP-MS using a Plasma II (Nu instruments, Wrexham, UK). To validate efficient sample digestion procedures of carbonate fractions, total samples were treated with either 3 mol l−1 HNO3 and 0.5 mol l−1 HCl, respectively. Results of both leaching procedures are identical within reproducibility. Reference values for SRM 88A (formerly NBS 88A), SRM 1B (formerly NBS 1B), SARM 40, SARM 43, JDo-1, JLs-1, and San Carlos olivine range from 0.70292 to 0.73724 in 87Sr/86Sr and from -2.80 to -0.41 ‰ for δ26Mg, respectively. This set of geological reference materials can be used for sedimentary rock material with different carbonate mineral and matrix composition as quality control measurements of combined stable Mg and radiogenic Sr isotope analyses.•We present a protocol that facilitates the chemical separation of Mg and Sr in carbonate bearing geological reference materials including 87Sr/86Sr and δ26Mg of certified reference materials. Graphical abstract Image, graphical abstract |
| Databáze: | OpenAIRE |
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