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    An intercomparison of procedures for the determination of total mercury in seawater and recommendations regarding mercury speciation during GEOTRACES cruises

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    Date
    2012-02
    Author
    Lamborg, Carl H.  Concept link
    Hammerschmidt, Chad R.  Concept link
    Gill, Gary A.  Concept link
    Mason, Robert P.  Concept link
    Gichuki, Susan  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/6612
    As published
    https://doi.org/10.4319/lom.2012.10.90
    DOI
    10.4319/lom.2012.10.90
    Abstract
    We conducted a laboratory intercomparison of total mercury (Hg) determination in seawater collected during U.S. GEOTRACES Intercalibration cruises in 2008 and 2009 to the NW Atlantic and NE Pacific Oceans. Results indicated substantial disagreement between the participating laboratories, which appeared to be affected most strongly by bottle cleanliness and preservation procedures. In addition, we examined the effectiveness of various collection and sample preparation procedures that may be used on future GEOTRACES cruises. The type of sampling system and filtration medium appeared to make little difference to results. Finally, and in light of results from experiments that considered sample bottle material effect and the development of new methods for CH3Hg+ extraction from seawater, we propose a recommended procedure for determining all four of the major Hg species in seawater (elemental, dimethyl-, monomethyl-, and total Hg).
    Description
    Author Posting. © Association for the Sciences of Limnology and Oceanography, 2012. This article is posted here by permission of Association for the Sciences of Limnology and Oceanography for personal use, not for redistribution. The definitive version was published in Limnology and Oceanography: Methods 10 (2012): 90-100, doi:10.4319/lom.2012.10.90.
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    • Marine Chemistry and Geochemistry (MC&G)
    Suggested Citation
    Limnology and Oceanography: Methods 10 (2012): 90-100
     

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