1. Trace Element Speciation Laboratory, Department of Chemistry, Meston Walk, University of Aberdeen, Aberdeen AB24 3UE, Scotland, United Kingdom
2. Matis, Icelandic Food and Biotech R&D, Vinlandsleid 12, 113 Reykjavik, Iceland
3. Aberdeen Centre of Environmental Sustainability, St. Machar Drive, Aberdeen, Aberdeen AB24 3UU, Scotland, United Kingdom