Naslov
PCBs and DDTs in Bluefin tuna from the Adriatic Sea

Autori
D. Klinčić, S. Herceg Romanić, Z. Kljaković- Gašpić, V. Tičina

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Technical Program, Agenda of Sessions, Abstract PDF / - , 2016, 786-786

Skup
Pittsburgh Conference on Analytical Chemistry & Applied Spectroscopy 2016. (Pittcon 2016)

Mjesto i datum
Atlanta (GA), Sjedinjene Američke Države; Gruzija, 06.03.2016. - 10.03.2016

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Environmental/Biological Samples; GC; Monitoring; PCB's

Sažetak
Top marine predators with long life spans, such as tuna, can contain high concentrations of organochlorine contaminants (OCs). Tuna is a good bioindicator that serves for obtaining data on marine ecosystem contamination. Being an important foodstuff, it also represents a potential source of human exposure. Light meat samples of 9 wild Bluefin tuna (Thunnus thynnus) caught in the Adriatic Sea were freeze-dried and extracted with n- hexane:acetone=50:50 (20 mL) in a 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 commercial tubes pre-packed with carbon. Analysis was done on a 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 metabolite of p, p´-DDT. Concentrations of p, p´- DDT were 2 to 20 times lower than those of p, p ´-DDE. The sum of six indicator PCB congeners accounted for 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 tuna age and/or body weight confirmed that the most stable and most degradation- resistant organochlorine compounds accumulate in the organism of a tuna during its life. The OC concentrations found in this study should not raise concern regarding human health risk, but indicate the need for continuous monitoring in marine organisms, especially species such as farmed tuna, which is an important food and export product.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Javno zdravstvo i zdravstvena zaštita

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