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The suitability of solvent extraction for   210 Po analysis from groundwater samples was assessed using three extractive scintillation cocktails, POLEX, TOPO and TNOA. Validation of the extraction method was carried out using both distilled water samples with some radionuclides added and real groundwater samples. Extraction of polonium from spiked waters was successful and no co-extraction of   234 U or   238 U occurred. However, the extraction results from groundwaters differed greatly from the spiked water samples. The main interfering nuclides were   234 U and   238 U, which led to incorrect results in   210 Po analysis. Due to the co-extraction of uranium from real groundwaters, validation of the method was unfeasible.

Method validation in solvent extraction for 210 Po determination from groundwaters