Rapid column extraction method for actinides and 89/90Sr in water samples |
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Authors: | S L Maxwell III |
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Institution: | (1) Westinghouse Savannah River Company, Building 735-B, Aiken, SC 29808, USA |
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Abstract: | Summary The SRS Environmental Laboratory analyzes water samples for environmental monitoring, including river water and ground water
samples. A new, faster actinide and 89/90Sr separation method has been developed and implemented to improve productivity, reduce labor costs and add capacity to this
laboratory.This method uses stacked TEVA Resinò, TRU Resinòand Sr-Resinòcartridges from Eichrom Technologies (Darien, IL, USA) that allows the rapid separation of plutonium, neptunium, uranium,
americium, curium and thorium using a single multi-stage column combined with alpha-spectrometry. By using vacuum box cartridge
technology with rapid flow rates, sample preparation time is minimized. The method can be used for routine analysis or as
a rapid method for emergency preparedness. Thorium and curium are often analyzed separately due to the interference of the
daughter of 229Th tracer, actinium (225Ac) on curium isotopes when measured by alpha-spectrometry. This new method also adds a separation step using DGA Resinò, (diglycolamide resin, Eichrom Technologies) to remove 225Ac and allow the separation and analysis of thorium isotopes and curium isotopes at the same time. |
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