1. School of Natural and Environmental Sciences – Chemistry Bedson Building Newcastle University Newcastle upon Tyne NE1 7RU UK
2. BiBerChem Research Limited The Biosphere Drayman's Way, Newcastle Helix, Corporation Street Newcastle upon Tyne NE4 5BX UK
3. Organische Geochemie Helmholtz-Zentrum Potsdam Deutsches GeoForschungsZentrum Haus B228, Telegrafenberg 14473 Potsdam Germany
4. Organic Geochemistry Institute for Chemistry and Biology of the Marine Environment (ICBM) Carl von Ossietzky University Oldenburg Carl-von-Ossietzky-Straße 9–11 D-26111 Oldenburg Germany