Presentation on theme: "Trace metal distribution in the water column along 40°S Christian Schlosser, Jessica Klar, Ebby Desai, and Eric Achterberg National Oceanography Centre."— Presentation transcript:
Trace metal distribution in the water column along 40°S Christian Schlosser, Jessica Klar, Ebby Desai, and Eric Achterberg National Oceanography Centre Southampton
Cruise Track and Sampling Positions UK GEOTRACES 40°S RRS James Cook JC068 (Dec. 2011 - Jan. 2012) 15 Ti casts (full depth) 2 Ti cast (1000m) ~ 150 surface sites Trace Metal Sampling Ti rosette frame with trace metal clean OTE bottles and self-triggering bottle closure system Fish Analysis Dissolved and total dissolvable Fe, Cd, Pb, Cu, Ni, (Zn) by ID-ICP-MS Dissolved and total dissolvable Ag, Mn (Co) by standard addition ICP-MS Dissolved and total dissolvable Al by flow injection fluorescence (Brown and Bruland, 2008)
3 12 ml sample Spiked with isotope mixture Standard addition for mono-isotopic elements (Co, Mn) UV digestion Chelating resin WAKO 1 ml elution with 1.5 M HNO 3 Measured on XR Element II HR ICPMS - 100 µl isotope mix - Standard addition Co/Mn - Buffer 1.5 M HNO3 Preconcentration for Multi Element Analysis
4 20 ml sample Standard addition 1 day equilibration Dowex anion exchange resin 2 ml elution with 1.5 M HNO 3 Measured on XSeries ICPMS - Standard addition Ag 1.5 M HNO3 Preconcentration for Ag
Work in Progress Multi trace element analysis of surface and subsurface samples from JC068 and D357 by isotope dilution/standard Addition ICP-MS (end of October this year) Fe ligand analysis (beginning of next year) Fluorescence dissolved organic matter (FDOM) (beginning of next year)
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