Naslov
Total mercury content in molluscs and fish from Adriatic Sea

Autori
Vedrina-Dragojević, Irena ; Dragojević, Dubravko ; Bujan, Marija ; Šebečić, Blaženka

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

Izvornik
2nd International IUPAC Symposium, Trace Elements in Food, Book of Abstract, Oral and Poster Presentation / Korsten, B. ; Bickel, M. ; Grobecker, K-H. - Brisel : Joint Research Centre, 2004, 82-82

Skup
2nd International IUPAC Symposium, Trace Elements in Food

Mjesto i datum
Bruxelles, Belgija, 07.09.2004. - 08.09.2004

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
total mercury; fish; molluscs; GFAAS

Sažetak
Seafood, including fish and molluscs, have always constituted a large portion of dietary protein for many of the world's coastal population. Recently, as dietary concerns about fat and cholesterol mount and as rapid transportation and improved distribution methods become available, seafoods have gained more widespread popularity. But it is also well known that fish are major source of mercury, a potent neurotoxin, deleterius for humans and other mammals. Fish can absorb mercury both directly from water through the gill membranes and from its food. The accumulation of mercury in fish is influenced by the quite a number of factors, among which age, size, fish, ecology, feeding, habits, environmental variables. In regard to a long known and still persisting problem of ecosystem loaded with mercury, total mercury contents in different species of fish and molluscs in the Adriatic Sea have been followed in an interval of 12 years. Total mercury concentrations were determined by GFAAS after microwave digestion of the edible of fish tissues. Depending on sample the mean values for the total mercury concentrations range from 0.042 mg/kg up to 0.171 mg/kg fresh fish, that is, from 0.153 mg/kg up to 0.692 mg/kg calculated on the sample-dry-matter basis. The lowest concentrations were found in the samples european anchovy and red scorpionfish, and the highest concentrations were determined in the samples squid and calamary, which could have been expected due to the fact that molluscs, like shellfish, belong to a group of sea organisms with more expressive mercury accumulation. The results of analysis reveal positive shifts and unlike the samples in a previos study (12 years ago) all the investigated samples meet the conditions of the Public Health Regulations on the quantity of pesticides, mycotoxins, metals, histamine and similar substances that may occur in foodstuff and on other conditiond as to the standards of foodstuff and objects of general use, wich fixed the total Hg content at maximum of 0.5 mg/kg on the basis of fresh mass.

Izvorni jezik
Engleski

Znanstvena područja
Prehrambena tehnologija

POVEZANOST RADA