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PCBs and DDTs in Bluefin tuna from the Adriatic Sea
Poster Title: PCBs and DDTs in Bluefin tuna from the Adriatic Sea
Submitted on 31 Mar 2017
Author(s): D. Klinčić, S. Herceg Romanić, Z. Kljaković-Gašpić, V. Tičina
Affiliations: Institute for Medical Research and Occupational Health, Ksaverska c. 2, 10 001 Zagreb, Croatia; Institute of Oceanography and Fisheries, Šetalište I. Meštrovića 63, 21 000 Split, Croatia
This poster was presented at Pittsburgh Conference on Analytical Chemistry & Applied Spectroscopy (PITTCON), Atlanta, Georgia, USA, 2016
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Poster Information
Abstract: Top marine predators with long life span, such as tuna can contain high concentrations of organochlorine contaminants (OCs). Tuna is good bioindicator that serves for obtaining the marine ecosystem contamination. Being an important foodstuff, it also presents potential source of human exposure to contamination.
Light meat samples of 9 wild bluefin tuna (Thunnus thynnus) caught in Adriatic Sea were freeze-dried, extracted with n-hexane:acetone=50:50 (20 mL) in Microwave Accelerated Reaction System (CEM, USA). Extracts were further cleaned with 96% sulphuric acid, by adsorption chromatography on a multilayer silica column and finally on a commercial tubes pre-packed with carbon. Analysis was done on high-resolution gas chromatograph (Clarus 500, Perkin Elmer) with ECD detectors on two capillary columns simultaneously.
The highest concentrations were found for p,p´-DDE which is the main, highly stable p,p´-DDT's metabolite. Concentrations of p,p´-DDT were 2 to 20 times lower than of p,p´-DDE. Sum of six indicator PCB congeners accounted between 54% and 75% of total PCB concentrations. Higher chlorinated indicator PCBs (PCB-153, PCB-138, and PCB-180) were found in the highest concentrations. Positive correlations of PCB-138, -153, -180 and p,p´-DDE with tunas age and/or body weight confirms that the most stable and the most resistant to degradation organochlorine compounds accumulate in tuna organism during her life.
OCs concentrations found in this study do not raise concern about human health risk but indicate the need for continuous monitoring of levels in marine organisms, especially those like farmed tuna which is an important food and export product.
Summary: Aim of this work was to investigate the concentration levels and pattern distribution of 20 PCB congeners and p,p’- DDT and its main metabolites (p,p’- DDE and p,p’- DDD) in the muscle tissue of 9 wild Bluefin tuna (Thunnus thynnus) fish caught in the Adriatic Sea (the northernmost branch of the Mediterranean Sea)References: /Report abuse »
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