Full Length Research Paper
Abstract
An analytical procedure was proposed for the determination of 226Ra at ultratrace levels in sand filters using sector field inductively coupled plasma mass spectrometry (ICP-MS). Radium was pre-concentrated using an impregnated manganese dioxide filter and separated from strontium using Eichrom“Sr-resin.” Following the extraction chromatography, polyatomic ions of Pb and W were eliminated by optimizing the operation parameter of ICP-MS. The detection limit of 226Ra was found to be 0.9 fg ml-1(33 mBq kg-1). Underground water samples and sands of the filters were analyzed for226Ra. Furthermore, radium removal from sand filters was studied using inorganic acids.226Ra was measured in the precipitation of dissolved oxide layers from the sand filters.
Key words: 226Ra, ICP-MS, sand filter.
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