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Report No.

Simple determination method using ICP-MS for $$^{129}$$I in radioactive liquid waste solidified with bitumen

Kameo, Yutaka ; Ishimori, Kenichiro ; Shimada, Asako ; Takahashi, Kuniaki 

A simple determination method was developed to measure $$^{129}$$I in low level radioactive liquid waste solidified with bitumen. A simulated bituminized product sample was cut to 0.02 g pieces, subsequently these pieces and sodium carbonate were heated in an electric furnace. This procedure could well decompose the bituminized sample without volatilizing $$^{129}$$I. Sixty to seventy percent of $$^{129}$$I was recovered by a solid phase extraction disk from a solution containing the decomposed sample. A dynamic reaction cell inductively coupled plasma mass spectrometer was applied to measure $$^{129}$$I, and as a result, detection limit of $$^{129}$$I was reduced to by a factor of about 6 comparing with conventional ICP-MS measurement. Determined radioactivity concentration for the simulated bituminized sample containing $$^{129}$$I was good agreement with expected value within 6% error.



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Category:Chemistry, Analytical



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