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A high-throughput method for the determination of Os concentrations and isotope ratio measurements in small-size biological samples
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
Swedish University of Agricultural Sciences, Department of Wildlife, Fish and Environmental Studies.ORCID-id: 0000-0003-4208-345X
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
ALS Scandinavia AB.
Vise andre og tillknytning
2013 (engelsk)Inngår i: Journal of Analytical Atomic Spectrometry, ISSN 0267-9477, E-ISSN 1364-5544, Vol. 28, nr 10, s. 1591-1599Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
2013. Vol. 28, nr 10, s. 1591-1599
HSV kategori
Forskningsprogram
Tillämpad geologi
Identifikatorer
URN: urn:nbn:se:ltu:diva-9547DOI: 10.1039/c3ja50201eISI: 000324414800003Scopus ID: 2-s2.0-84883871721Lokal ID: 831b6e4f-3f9d-4a4c-b345-62813987fd40OAI: oai:DiVA.org:ltu-9547DiVA, id: diva2:982485
Merknad
Validerad; 2013; 20130924 (andbra)Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2018-07-10bibliografisk kontrollert

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Pallavicini, NicolaEcke, FraukeEngström, EmmaBaxter, DouglasRodushkin, Ilya

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