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By over-determining the carbonate system in natural sea-ice brine samples, we have confirmed that stoichiometric equilibrium constants for the dissociation of carbonic acid in seawater (K 1⁎ , K 2⁎ ) derived for general oceanic conditions may not be readily extrapolated to sea-ice brine systems. Dissolved inorganic carbon, total alkalinity, pH, and pCO 2 measurements...
A field and laboratory study of the accuracy of a method commonly used to determine free sulphide concentrations in the porewater of marine sediments is presented. The method uses an ion-selective electrode (ISE), sensitive to the sulphide ion (S2−), in sediments buffered to high pH (>12) and is commonly used in regulatory monitoring programs to assess the impacts of open net-pen finfish aquaculture...
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