|
1A - Environmental analytical methods (MOP/11) Analysis, degradation and sorption of Sea-nine using a new GC-PFPD method. Haller, Rune1, 2, Dahllöf, Ingela1, 1 University of Copenhagen, Copenhagen, Denmark, Denmark2 NERI, Roskilde, Denmark, Denmark ABSTRACT- Constrictions on the use of TBT and other organotin-copper-based antifouling paints, has led to the development of new antifouling agents. It is crucial to understand the fate and effect of these new biocides, so that a relevant risk assessment can be made for the marine environment. One of the new biocides, added to the frequently used copper-based antifouling paints, is Sea-nine. Different methods, mainly based on Solid-phase extraction combined with GC-MS or HPLC-MS, have been developed for detection of Sea-nine in seawater, during the last ten years. The aim of this work was to validate and evaluate the use of a new method using Gas Chromatography combined with Pulsed Flame Photometric Detector (GC-PFPD) for the separation and detection of Sea-nine. To extract Sea-nine from seawater, different cartridges were tested, and the Isolute ENV+ cartridges were found to be the most efficient. Combining this SPE-system with the GC-PFPD, a detection limit of 50 ppt and a recovery of more than 98% was obtained. Because of the high reproducibility, low detection limit and high recovery, the method was used to analyse sorption to organic matter and biodegradation. The method was also used to analyse the concentrations of Sea-nine in different Danish harbours and coastal waters. Key words: GC-PFPD, Sea-nine |
