Volume 37, Number C1, February 2002ECORAD 2001: The Radioecology - Ecotoxicology of Continental and Estuatine Environments
|Page(s)||C1-101 - C1-106|
|Published online||14 October 2009|
210Po and 210Pb in fish and shellfish from Guanabara Bay, Brazil
Dep. of Chemistry, Pontificia Universidade Catolica, R. Marquês de S. Vicente 225, CEP 22453-900, Rio de Janeiro, Brazil
2 IRD, Comissao Nacional de Energia Nuclear, CP. 37750, Barra da Tijuca, Rio de Janeiro, Brazil
Muscles of forty-four fish of two different species, Mugil spp and Micropogonia furnieri, and six composite samples of the shellfish Perna perna, collected in Guanabara Bay, a tropical estuary, were analysed for 210Po and 210Pb contents. The method for 210Po determination consisted of spontaneous deposition on copper disks, followed by alfa counting. The method for 210Pb determination was mineralization followed by leaching, ion-exchange separation, precipitation and, finally, beta counting. The average values found for concentration of 210Po in fish was 2.6 Bq.kg-1, wet basis, while for shellfish the values were higher, reaching 43.8 Bq.kg-1, wet basis. For 210Pb, concentrations were very low, frequently below the detection limit for fish samples. For shellfish this was higher, reaching 1.8 Bq.kg-1, wet basis.
© EDP Sciences, 2002
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