1. Maritime Institute, Department of Environmental Protection, Gdynia Maritime University, 81-225 Gdynia, Poland
2. Marine Research Institute, Klaipėda University, 92294 Klaipėda, Lithuania
3. Maritime Institute, Department of Operational Oceanography, Gdynia Maritime University, 81-225 Gdynia, Poland
4. Laboratory for Trace Organic Analyses, Krakow University of Technology, 31-155 Krakow, Poland