土壤样品中^(239+240)Pu的测定

Determination of^(239+240)Pu in Soil Sample

参照GB112 19.1 89土壤中钚的测定———萃取色层法 ,采用2 3 8Pu同位素示踪、电沉积制源、α能谱测量 ,对国内某核设施附近土壤样品以及IAEA土壤参考样品IAEA Soil 6和IAEA 3 75中的2 3 9+ 2 4 0 Pu含量进行了分析测定。测定值与IAEA参考样品参考值接近 ,与IAEA Soil 6和IAEA 3 75的参考值间的相对偏差分别为 -3 .8%和 -2 .3 %。

This work is based on the national standard of China GB 11219.1-89(determination of plutonium in soil-extraction chromatography method). 238Pu is used as a yield tracer, and the electroplating source is counted with a low background α spectrometer. The 239+240Pu contents in the soil samples from near a nuclear facility and two IAEA reference materials, IAEA-Soil-6 and IAEA-375 are determined using this method. A good agreement is achieved between our results and the IAEA reference values within 95% confidence, the corresponding relative deviation is -3.8% and -2.3%, respectively for IAEA-Soil-6 and IAEA-375.