【摘要】 采用自制的LⅢ吸收边分析装置,建立了测量20~200g/L铀浓度的分析方法。通过实验确定了测量中铀的LⅢ吸收边左拟合区间为1 659~1 856道,右拟合区间为2 063~2 280道,铀的LⅢ吸收边为1 995道。9mol/L以下的硝酸、10g/L以下的Al以及10g/L以下的Fe对铀测量无显著影响。在铀的工作曲线范围内,其测量精密度均优于0.5%,稳定性好。利用本装置测量铀回收处理台架实验中的部分样品,取得了满意结果。更多还原

【Abstract】 By independent research LⅢ-absorption edge densimeter,an analytical method for uranium sample with the concentration from 20g/L to 200g/L was developed.The fitting area for uranium measurement was determined through experiment.The left fitting area was 1 659-1 856 channel,and the right one was 2 063-2 280 channel.The uranium LⅢ-absorption edge was at 1 995 channel.The results show that the influence of HNO3 concentration lower than 9mol/L,Al and Fe concentration lower than 10g/L was negligibly small.The uranium measurement precision is better than 0.5%,and the instrument stability is good.Some samples in bench test of uranium recovery were determined.The results are satisfactory.更多还原