Recent developments in the analysis of transuranics (Np, Pu, Am) in seawater

Determination of Pu isotope concentrations and isotope ratio by inductively coupled plasma mass spectrometry: a review of analytical methodology

“…Pu in the sea-water has generally been pre-treated on board the ship by coprecipitation with Fe(OH) 2 , Fe(OH) 3 or MnO 2 . Lee et al 53 and La Rosa et al 112 used sequential co-precipitation using MnO 2 precipitation and Fe(OH) 3 to reduce the sea-water sample volume. Eroglu et al 87 also used sequential precipitation for the pre-treatment of sea-water.…”

Reference material for radionuclides in sediment IAEA-384 (Fangataufa Lagoon sediment)

“…Resins (a single TRU column or double UTEVA + TRU columns) for the separation and subsequent electrodeposition for alpha-spectrometry ( 238 Pu) and/or for direct ICPMS and AMS analysis ( 239 Pu, 240 Pu, 241 Pu, 242 Pu) were also used. 14,15 The samples for mass spectrometry analyses were either leached from stainless steel discs after alphaspectrometry measurements, or analyzed directly in mass spectrometers. Generally, a reasonable agreement was obtained between alpha-spectrometry and mass spectrometry results, although the latter were mostly found on the right side of the distribution mean.…”

Accelerator Mass Spectrometry Analysis of 237NP in Environmental Samples

“…The count rates of samples taken in different batches fluctuated greatly, indicating a variability of the sample preparation process. Sometimes, the chemical yield is not strictly constant and even varied by three times, as it has been reported in the earlier 237 Np preparations (La Rosa et al 2005). The specific research on this fluctuation reason, such as chemical yield and/or experimental operation skills will be undertaken in the near future.…”