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Online preconcentration ICP-MS analysis of rare earth elements in seawater

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dc.creator Hathorne, Ed C.
dc.creator Haley, Brian
dc.creator Stichel, Torben
dc.creator Grasse, Patricia
dc.creator Zieringer, Moritz
dc.creator Frank, Martin
dc.date.accessioned 2012-11-12T18:48:57Z
dc.date.available 2012-11-12T18:48:57Z
dc.date.issued 2012-01-31
dc.identifier.citation Hathorne, E. C., B. Haley, T. Stichel, P. Grasse, M. Zieringer, and M. Frank (2012), Online preconcentration ICP-MS analysis of rare earth elements in seawater, Geochemistry Geophysics Geosystems, 13, Q01020, doi:10.1029/2011GC003907. en_US
dc.identifier.uri http://hdl.handle.net/1957/35042
dc.description This is the publisher’s final pdf. The published article is copyrighted by American Geophysical Union and can be found at: http://sites.agu.org/. en_US
dc.description.abstract The rare earth elements (REEs) with their systematically varying properties are powerful tracers of continental inputs, particle scavenging intensity and the oxidation state of seawater. However, their generally low (similar to pmol/kg) concentrations in seawater and fractionation potential during chemical treatment makes them difficult to measure. Here we report a technique using an automated preconcentration system, which efficiently separates seawater matrix elements and elutes the preconcentrated sample directly into the spray chamber of an ICP-MS instrument. The commercially available "seaFAST" system (Elemental Scientific Inc.) makes use of a resin with ethylenediaminetriacetic acid and iminodiacetic acid functional groups to preconcentrate REEs and other metals while anions and alkali and alkaline earth cations are washed out. Repeated measurements of seawater from 2000 m water depth in the Southern Ocean allows the external precision (2 sigma) of the technique to be estimated at <23% for all REEs and <15% for most. Comparison of Nd concentrations with isotope dilution measurements for 69 samples demonstrates that the two techniques generally agree within 15%. Accuracy was found to be good for all REEs by using a five point standard addition analysis of one sample and comparing measurements of mine water reference materials diluted with a NaCl matrix with recommended values in the literature. This makes the online preconcentration ICP-MS technique advantageous for the minimal sample preparation required and the relatively small sample volume consumed (7 mL) thus enabling large data sets for the REEs in seawater to be rapidly acquired. en_US
dc.language.iso en_US en_US
dc.publisher American Geophysical Union en_US
dc.relation.ispartofseries Geochemistry Geophysics Geosystems en_US
dc.relation.ispartofseries Vol. 13 no. 1 en_US
dc.subject ICP-MS en_US
dc.subject Rare earth elements en_US
dc.title Online preconcentration ICP-MS analysis of rare earth elements in seawater en_US
dc.type Article en_US
dc.description.peerreview yes en_US
dc.identifier.doi 10.1029/2011GC003907


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