A plant based on toa-tru joint extraction 238 pu/ 239+240 pu analysis method
An analysis method, plant technology, applied in the direction of analysis of materials, material separation, instruments, etc., can solve the problems that the accuracy of analysis cannot be determined, the analysis process and parameters are not described, and achieve the effect of eliminating counting interference
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Embodiment 1
[0079] Take 10 g of plant ash sample after ashing in a certain area, add 0.128 Bq tracer after burning 242 Pu, 8 mol / L nitric acid was heated and leached, concentrated ammonia water was adjusted to pH 9-10 to achieve co-precipitation, 30 mL of 8 mol / L nitric acid was dissolved and precipitated; TOA solid phase extraction: 50 mL of 10 mol / L hydrochloric acid, 30 The TOA column was washed with 3 mol / L nitric acid successively, and the 0.025 mol / L oxalic acid-0.150 mol / L nitric acid solution was used to desorb Pu; after evaporation to dryness and redissolving in 2 mol / L nitric acid, TRU solid phase extraction: 50 mL 8 mol / L nitric acid L nitric acid was used to wash the TRU column, and 0.1 mol / L ammonium hydrogen oxalate solution was used to elute Pu;
[0080] Experimental results: Pu recovery rate = 78.0%, 241 Decontamination factor of Am>10 3 , 228 Decontamination factor of Th >10 3 , 210 Decontamination factor of Po>10 4 .
Embodiment 2
[0082] Take 10 g of plant ash sample after ashing in a certain area, add 0.128 Bq tracer after burning 242 Pu, 8 mol / L nitric acid was heated and leached, concentrated ammonia water was adjusted to pH 9-10 to achieve co-precipitation, 30 mL of 8 mol / L nitric acid was used to dissolve the precipitation; TOA solid phase extraction: 70 mL of 10 mol / L hydrochloric acid, 30 The TOA column was washed with 3 mol / L nitric acid successively, and the 0.025 mol / L oxalic acid-0.150 mol / L nitric acid solution was used to desorb Pu; after evaporation to dryness and redissolving in 2 mol / L nitric acid, TRU solid phase extraction: 50 mL 8 mol / L nitric acid L nitric acid was used to wash the TRU column, and 0.1 mol / L ammonium hydrogen oxalate solution was used to elute Pu;
[0083] Experimental results: Pu recovery rate = 74.6%, 241 Decontamination factor of Am>10 4 , 228 Decontamination factor of Th > 2×10 3 , 210 Decontamination factor of Po>5×10 4 .
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