Copper complexation in the Northeast Pacific

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Coale, K. H., & Bruland, K. W. (1988). Copper complexation in the Northeast Pacific. Limnology & Oceanography, 33(5), 1084-1101.
TitleCopper complexation in the Northeast Pacific
AuthorsH. Coale, W. Bruland
AbstractCopper titrations were conducted at sea with differential pulse anodic stripping voltammetry to examine the degree to which copper was associated with organic ligands. Greater than 99.7% of the total dissolved copper in surface waters of the central Northeast Pacific shallower than 200 m was estimated to be associated with strong organic complexes. Below 200 m, increasing proportions of inorganic or labile copper species were observed. At middepths (1000 m), about 50-70% of the total dissolved copper was in the organically complexed form. Whereas total copper varies by a factor of only three from the surface to middepths (0.6-1.8 nM), copper complexation gives rise to extremely low cupric ion activities in surface waters ({Cu2+} = 1.4 × 10-4 M) and higher values at middepth ({Cu2+} = 10-11 M) -a variation of three orders of magnitude.
JournalLimnology & Oceanography
Start page1084
End page1101
Subjectscopper complexation, inorganic ligands, organic ligands, seawater, Pacific(Northeast)
NoteCited By (since 1996):208 Oceanography