Abstract
The binding of copper ion to the surfaces of the marine diatom Phaeodactylum tricornutum was studied in seawater pH 8. The cell wall complexing capacity and the average surface complex formation constant were determined by voltammetric titration curves. The presence of biotic particles at a concentration of 2.7 X 106 cells mL−1 does not hinder the measurement of stripping currents and the voltammetric fraction of non-reducible copper is the same as the copper bound to the cell surfaces as measured by atomic absorption spectrometry.
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