Pore water geochemistry of sediment core Potter_Cove_STA16

Methods: Sampling: • Rhizon technique (Seeberg-Elverfeldt et al. 2005) SO42-: • Ion chromatography (Metrohm IC Net 2.3) Fe2+: • Ferrozine method (Stookey 1970) NH4+: • spectrophotometrically using a Multiskan microplate reader Alkalinity: • Spectrophotometrically after Sarazin et al. (1999) using a Multiskan microplate reader δ56Fe(pw): • Removal of salt matrix by column chromatography (NTA Superflow columns, Qiagen) (Lohan et al. 2005) • Column separation using the Dowex 1X8 resin • Isotope analysis on a ThermoFinnigan Neptune Multicollector-ICP-MS (ESI Apex-Q desolvator, standard-sample bracketing method with IRMM-014) (Schoenberg and von Blanckenburg 2005)

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