The TBP extractant-containing resin and extraction chromatography technique were used to separate 11 trace elements in U3O8 CRMs. The sample was separated at a flow rate of 0. 5 mL/min with 3mol/L HNO3 as medium.

• 本法采用TBP萃取树脂，利用革取色谱分离技术，使铀与待测杂质元素在3mol/LHNO3介质中得到定量分离。