Jasper Zöbelein¹, Thorsten Dittmar^1,2, Shubham Sawle³, Gernot Friedrichs³ and Hannelore Waska¹, (1)University of Oldenburg, Institute for Chemistry and Biology of the Marine Environment (ICBM), Oldenburg, Germany, (2)University of Oldenburg, Helmholtz Institute for Functional Marine Biodiversity, Oldenburg, Germany, (3)University of Kiel, Institute of Physical Chemistry, Kiel, Germany