Chikyukagaku
Online ISSN : 2188-5923
Print ISSN : 0386-4073
ISSN-L : 0386-4073
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Review
  • Hajime Obata, Kuo Hong Wong
    2022 Volume 56 Issue 3 Pages 33-46
    Published: September 25, 2022
    Released on J-STAGE: September 25, 2022
    JOURNAL OPEN ACCESS

    Trace metals, like iron, copper, zinc and cobalt, in seawater are essential for phytoplankton growth and limit the primary production in some oceanic regions. It is crucial to reveal not only distributions of the metals but also their chemical speciation in seawater because their availability to phytoplankton depends on their speciation. At present, it is well known that more than 99% of iron and copper are complexed with organic ligands in seawater, which was revealed mainly by using voltammetry. In this review, we introduce the electroanalytical methods of organic ligands for trace metals in seawater. Moreover, we indicate the voltammetric methods to determine nanomolar levels of specific organic ligands for trace metals, such as humic substances and thiols, in seawater.

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