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Seasonal and spatial variations of (210)Po and (210)Pb activity concentrations in Mytilus galloprovincialis from Croatian coast of the Adriatic Sea

August 20, 2013

Results of 2years monitoring of (210)Po and (210)Pb activity concentrations in soft tissue of the species Mytilus galloprovincialis from Croatian part of the Adriatic coast are presented. The samples were collected at thirteen coastal stations (some of which are also a part of the Mediterranean Mussel Watch Project) in spring and autumn of 2010 and 2011. The collected mussels were ranging between 4cm and 6cm in shell length. After sample pre-treatment lead and polonium were radiochemically separated on Sr resin. (210)Po was determined by alpha-particle spectrometry and (210)Pb was determined, via (210)Bi, by a low-level gas proportional counter. The results of (210)Po activity concentrations were found to vary between (104±11) and (1421±81) Bqkg(-1) dry weight while (210)Pb activity concentrations were much lower and in range (8.2±5.3)-(94.1±29.8) Bqkg(-1) dry weight. Higher (210)Po and (210)Pb activity concentrations were determined in spring period. The inter-site differences seen in their activity concentrations can be due to natural background levels of sites. The (210)Po/(210)Pb activity concentration ratios in all cases exceeded unity for all mussel samples and ranged between 4.0 and 47.9.

Rožmarić M, Rogić M, Benedik L, Strok M, Barišić D, in press. Seasonal and spatial variations of (210)Po and (210)Pb activity concentrations in Mytilus galloprovincialis from Croatian coast of the Adriatic Sea, Chemosphere, 2013, doi:

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