Helena Osterholz¹, David P.A. Kilgour², Ryan Pereira³, Jutta Niggemann⁴, Thorsten Dittmar⁵, Lauri Parviainen⁶, Maarit Yli-Kaila⁶ and Tiina Lamminmäki⁶, (1)Leibniz Institute for Baltic Sea Research, Marine Chemistry, Rostock, Germany, (2)Vibrat-Ion Ltd, Aberystwyth, Wales, United Kingdom, Aberystwyth, United Kingdom, (3)Heriot-Watt University, Lyell Centre, Edinburgh, United Kingdom, (4)Institute for Chemistry and Biology of the Marine Environment (ICBM), Carl von Ossietzky Universität Oldenburg, Oldenburg, Germany, (5)University of Oldenburg, Institute for Chemistry and Biology of the Marine Environment (ICBM), Oldenburg, Germany, (6)Posiva Oy, Eurajoki, Finland, Eurajoki, Finland