Determination of Dissolved Iron Speciation in the North East Atlantic Ocean by Flow Injection Chemiluminescence ...

• Main Author: Ussher, Simon James
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: University of Plymouth 2005
• Subjects: North East Atlantic
• Online Access: https://dx.doi.org/10.24382/2740; https://pearl.plymouth.ac.uk/handle/10026.1/2140

The knowledge of iron biogeochemistry is constrained by paucity in the understanding of its uptake, transport and the partitioning of the element between different phases, redox states and coordination sites. The work presented in this thesis describes the optimisation and evaluation of a Flow Injection Chemiluminescence (FICL) method for the shipboard determination of dissolved Fe(II) species (< 0.2 µm) in seawater. This includes results from two ship-board trials and a study of the effects of model ligands on iron redox speciation measurements in natural waters. The method was also used to determine the distribution of dissolved iron species (< 0.2 µm) in two contrasting study areas in the North East Atlantic Ocean and for a study of aerosol iron dissolution in seawater. The FI-CL method was evaluated and was found to be robust and sensitive, to have low limits o f detection (5-12 pM) and short analysis times 3 min) suitable for the high resolution spatial and temporal sampling required for shipboard ...