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A high-throughput method for the determination of Os concentrations and isotope ratio measurements in small-size biological samples
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
Swedish University of Agricultural Sciences, Department of Wildlife, Fish and Environmental Studies.ORCID iD: 0000-0003-4208-345X
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
ALS Scandinavia AB.
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2013 (English)In: Journal of Analytical Atomic Spectrometry, ISSN 0267-9477, E-ISSN 1364-5544, Vol. 28, no 10, p. 1591-1599Article in journal (Refereed) Published
Abstract [en]

An analytical method allowing multi-element characterization by external calibration, osmium (Os) concentration determination by isotope dilution (ID) and 187Os/188Os isotope abundance ratio measurement from a single sample preparation was developed. The method consists of microwave-assisted, closed-vessel acid digestion of small (0.01-0.4 g dry weight) biological samples spiked with Os solution enriched in a 190Os isotope followed by concentration and Os isotope ratio measurements using double-focusing, sector field inductively coupled plasma mass-spectrometry (ICP-SFMS) operated with methane addition to the plasma and solution nebulization (SN) sample introduction. For samples with Os content below 500 pg, complementary analysis using gas-phase introduction (GPI) on the remaining sample digests was performed. The use of disposable plastic lab ware for sample digestion and analysis by SN ICP-SFMS circumvents Os carry-over effects and improves the sample throughput and cost-efficiency of the method. For a 0.1 g dried sample, Os method limits of detection (MLODs) of 2 pg g -1 and 0.2 pg g-1 were obtained using SN or GPI, respectively. Long-term reproducibility of 187Os/188Os isotope abundance ratio measurements using the GPI approach was better than 1.5% RSD for our in-house control sample (moose kidney) with an Os concentration of approximately 5 pg g-1. Os data for several commercially available reference materials of biological or plant origin (not certified for Os) are presented. The method was used in the large scale bio-monitoring of free-living bank voles from an area affected by anthropogenic Os emissions.

Place, publisher, year, edition, pages
2013. Vol. 28, no 10, p. 1591-1599
National Category
Geochemistry
Research subject
Applied Geology
Identifiers
URN: urn:nbn:se:ltu:diva-9547DOI: 10.1039/c3ja50201eISI: 000324414800003Scopus ID: 2-s2.0-84883871721Local ID: 831b6e4f-3f9d-4a4c-b345-62813987fd40OAI: oai:DiVA.org:ltu-9547DiVA, id: diva2:982485
Note
Validerad; 2013; 20130924 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Pallavicini, NicolaEcke, FraukeEngström, EmmaBaxter, DouglasRodushkin, Ilya

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