Multiactinide Analysis with Accelerator Mass Spectrometry for Ultratrace Determination in Small Samples: Application to an in Situ Radionuclide Tracer Test within the Colloid Formation and Migration Experiment at the Grimsel Test Site (Switzerland)
| Autor: | Horst Geckeis, Bill Lanyon, Markus Plaschke, Carmen Garcia Perez, Peter Steier, Frank Geyer, Francesca Quinto, Florian Huber, Markus Lagos, Robin Golser, Thorsten Schäfer, Ingo Blechschmidt |
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| Rok vydání: | 2017 |
| Předmět: |
Radionuclide
Chemistry Analytical chemistry Radioactive waste 02 engineering and technology Actinide 010501 environmental sciences 021001 nanoscience & nanotechnology 01 natural sciences Analytical Chemistry Colloid TRACER 0210 nano-technology Inductively coupled plasma mass spectrometry Groundwater 0105 earth and related environmental sciences Accelerator mass spectrometry |
| Zdroj: | Analytical Chemistry. 89:7182-7189 |
| ISSN: | 1520-6882 0003-2700 |
| Popis: | The multiactinide analysis with accelerator mass spectrometry (AMS) was applied to samples collected from the run 13-05 of the Colloid Formation and Migration (CFM) experiment at the Grimsel Test Site (GTS). In this in situ radionuclide tracer test, the environmental behavior of 233U, 237Np, 242Pu, and 243Am was investigated in a water conductive shear zone under conditions relevant for a nuclear waste repository in crystalline rock. The concentration of the actinides in the GTS groundwater was determined with AMS over 6 orders of magnitude from ∼15 pg/g down to ∼25 ag/g. Levels above 10 fg/g were investigated with both sector field inductively coupled plasma mass spectrometry (SF-ICPMS) and AMS. Agreement within a relative uncertainty of 50% was found for 237Np, 242Pu, and 243Am concentrations determined with the two analytical methods. With the extreme sensitivity of AMS, the long-term release and retention of the actinides was investigated over 8 months in the tailing of the breakthrough curve of run 1... |
| Databáze: | OpenAIRE |
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