The organic complexation of iron and copper: an intercomparison of competitive ligand exchange‐adsorptive cathodic stripping voltammetry (CLE‐ACSV) techniques

• DOI: 10.4319/lom.2012.10.496
• Publication Date: 2016-08-05T23:25:55Z
• Authors: Kristen N. Buck; James Moffett; Katherine A. Barbeau; Randelle M. Bundy; Yoshiko Kondo; Jingfeng Wu
• Keywords: Cathodic stripping voltammetry; Geotraces; Genetic algorithm; Stripping (fiber)

Characterization of the speciation iron and copper is an important objective GEOTRACES Science Plan. To incorporate measurements into such a multinational program, standard practices must be adopted that allow data from multiple labs to synthesized. Competitive ligand exchange‐adsorptive cathodic stripping voltammetry (CLE‐ACSV) primary technique employed for measuring metal‐binding ligands determining metal in seawater. The determination concentrations conditional stability constants particularly challenging, as results can influenced both by experimental conditions interpretation titration data. Here, we report investigation between four laboratories study using CLE‐ACSV. Samples were collected on II intercomparison cruise North Pacific Ocean May 2009 at 30° N, 140° W. This was carried out shipboard included assessment viability sample preservation freezing. Results showed consensus values could obtained different labs, but some existing problematic require further attention future work. A series recommendations emerged this will useful implementing multi‐investigator programs like GEOTRACES.