We discuss the voltammetric methods that are used to assess metal-organic complexation in seawater. These consist of titration methods using anodic stripping voltammetry (ASV) and cathodic stripping voltammetry competitive ligand experiments (CSV-CLE). These approaches and a kinetic approach using CSV-CLE give similar information on the amount of excess ligand to metal in a sample and the condi...

Abstract. Organic ligands are a key factor determining the availability of dissolved iron (DFe) in high-nutrient low-chlorophyll (HNLC) areas Southern Ocean. In this study, organic speciation Fe is investigated along natural gradient western Antarctic Peninsula, from an ice-covered shelf to open ocean. An electrochemical approach, competitive ligand exchange – adsorptive cathodic stripping volt...