Stable silicon isotope analysis on nanomole quantities using MC-ICP-MS with a hexapole gas-collision cell
2010 (English)In: Journal of Analytical Atomic Spectrometry, ISSN 0267-9477, E-ISSN 1364-5544, Vol. 25, no 2, 156-162 p.Article in journal (Refereed) Published
We demonstrate in this study that a single focusing multiple collector inductively coupled plasma massspectrometer (MC-ICP-MS) equipped with a hexapole gas-collision cell (GV-instrument Isoprobe) canprecisely determine the d29Si (2S.D., 0.2&) using a total Si consumption of less than 14 nmole (390 ngSi). Testing and evaluation of background, rinse time, and major matrix effects have been performed ina systematic way to establish a procedure to measure d29Si in small quantities. Chemical purificationprior to analysis is required to remove potential interferences. For data collected during a four-yearperiod, the average d29Si value of IRMM-018 relative to NBS-28 was found to be 0.95& (n ¼ 23,2S.D. 0.16&) with a 95% confidence interval (0.95 0.028&). The mean d29Si value of the Big-Batchstandard was found to be 5.50& (n ¼ 6, 2S.D. 0.26&). Although determination of the d30Simeasurements is not possible, with our current instrument we demonstrate that this system providesa fast and long-term reliable method for the analysis of d29Si in purified samples with low Siconcentration (18 mM Si).
Place, publisher, year, edition, pages
2010. Vol. 25, no 2, 156-162 p.
silicon isotopes, MC-ICP-MS
Research subject Geochemistry
IdentifiersURN: urn:nbn:se:su:diva-37447DOI: 10.1039/b911113aISI: 000273962800006OAI: oai:DiVA.org:su-37447DiVA: diva2:302133
ProjectsSilicon isotope-based reconstruction of silicon cycle and diatom production in the Baltic Sea; implications for climate change and eutrophication