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铀、钚的含量是镎产品的主要控制的指标之一。为了去除镎基体对铀、钚测量的干扰,本工作建立了TEVA萃取色层分离大量镎中铀、钚的方法,流程图详示于图1。取一定量的样品,调至3 mol/L HNO3介质,采用氨基磺酸亚铁(FS)、抗坏血酸(VC)先将镎还原到Np(Ⅳ),将钚还原至Pu(Ⅲ),然后将经过调酸调价的样品过TEVA萃取色层柱后用12 mL3 mol/L HNO3-0.05 mol/L FS-0.05 mol/L VC混合溶液淋洗铀、钚,将上柱穿透液与淋洗液合并收集
Uranium, plutonium content is one of the main indicators of control products. In order to eliminate the interference of matrix on uranium and plutonium measurements, this work established a method for the separation of a large amount of uranium and plutonium by TEVA extraction chromatography layer. A certain amount of sample was taken and transferred to 3 mol / L HNO3 medium. The ferrous sulphate (FS) and ascorbic acid (VC) were used to reduce 镎 to Np (Ⅳ) and plutonium to Pu (Ⅲ) After adjusting the acid value of the sample over TEVA extraction chromatography column with 12 mL of 3 mol / L HNO3-0.05 mol / L FS-0.05 mol / L VC mixed solution of leaching of uranium, plutonium, the column through the liquid and eluent Merged collection