Improved detection of transition and rare earth elements in marine samples with the CETAC DSX-100 preconcentration/matrix elimination system and ICP-MS |
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Authors: | M Kühn and M Kriews |
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Institution: | (1) Technical University Hamburg-Harburg, Institute of Water Management and Water Supply, Schwarzenbergstr. 95, 21073 Hamburg, Germany, DE;(2) Alfred-Wegener-Institute for Polar and Marine Research, Am Handelshafen 12, 27570 Bremerhaven, Germany, DE |
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Abstract: | A new method for detection of trace metals in saline samples is described using batch preconcentration with subsequent ICP-MS
analyses after direct sample insertion of the analyte loaded chelating resin. The samples were prepared using a CETAC DSX-100
system, which preconcentrates analytes and removes matrix components by a suspended particulate reagent (SPR). The SPR is
consisting of polymeric beads of 0.2 μm size that selectively binds the trace metals by iminodiacetic chelating groups. The
beads with bound analytes are then nebulized directly into the ICP-MS. The enrichment factors lay between 40 and 48 due to
the enrichment of 120 mL suspension to 2.5–3.0 mL eluate. The method was applied and validated to the successful determination
of traces of the transition metals Mn, Fe, Ni, Co, Cu, Zn, Cd, and Pb in the Open Ocean Seawater certified reference material
NASS-4 and the Coastal Seawater certified reference material CASS-3. In addition to the certified constituents the rare earth
elements La, Ce, Eu, Gd, Yb, and Lu were determined.
Received: 15 Oktober 1999 / Revised: 1 February 2000 / Accepted: 3 February 2000 |
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