Development of rapid and sensitive bioassay methods to contribute to actinide internal exposure medical response

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Synthesized faecal sample was used for actinide analytical method development in feces, with the purpose of rapid emergency response on potential radiological/nuclear accidents. High recoveries (>80%) for Np, Pu, and Am/Cm have been obtained after ashing, borate fusion, CaF2 coprecipitation, and chromatographic purification. To increase the signal intensity of actinides in ICP-MS/MS analysis, 7.5 mL/min He has be introduced into the collision/reaction cell, along with the application of APEX-Q/ACM introduction system＋x type lens. The developed method was validated by participating in the annual intercomparison organized by PROCORAD, France.