Gastaud, J.La Rosa, J.Liong Wee Kwong, L.Povinec, P.Fifield, L. KeithHausladen, P.di Tada, M.dos Santos, GLee, S. H.Wyse, E.2015-12-130236-5731http://hdl.handle.net/1885/93155IAEA reference materials (radionuclides in the marine environment) collected in areas affected by nuclear reprocessing plants and nuclear weapons tests have been analysed by semiconductor alpha-spectrometry (SAS), liquid scintillation spectrometry (LSS) and mass spectrometric techniques (high resolution ICP-MS and AMS) with the aim of developing analytical procedures and to study the geochemical behavior of plutonium in the marine environment. The Pu results obtained by SAS, ICP-MS and AMS were in reasonably good agreement (R2 = 0.99). The mean atom ratios of 240Pu/239Pu in IAEA reference materials, IAEA-134, 135 and 381 were (0.212±0.010), (0.211±0.004) and (0.242±0.004), respectively. IAEA-384 (Fangataufa Lagoon Sediment) gave a 24OPu/239Pu mean atom ratio of 0.051±0.001. The results of 241Pu obtained by ICP-MS and LSS also show reasonable agreement (R2 = 0.91). Pu isotopic signatures were useful in tracing Pu origin and in interpreting biogeochemical processes involving Pu in the marine environment.Keywords: plutonium; radioisotope; accelerator mass spectrometry; atom; atomic emission spectrometry; comparative study; conference paper; environmental monitoring; liquid scintillation counting; marine environment; mass spectrometry; sensitivity and specificity; s200110.1023/A:10106092159262015-12-12