基于α谱的尿中237 Np的测量方法

²³⁷Np属于高毒组核素，吸入人体后，会产生内照射危害。基于尿样中²³⁷Np的分析测量既是常规监测的重要手段，也是研究职业工作人员人体²³⁷Np剂量水平的关键方法，通过共沉淀预浓集，讨论了尿样中²³⁷Np的前处理过程，系统地研究了TEVA萃取色谱树脂分离纯化和电沉积过程对²³⁷Np化学回收率的影响。结果表明：该法对²³⁷Np的化学回收率可达88.5%，方法检测限为2.55×10^-5 Bq/L。该分析方法满足常规监测要求，适用于大体积尿样中²³⁷Np的监测评价。

Measurement of 237Np in Urine Based on Alpha Spectrometer

²³⁷Np is a highly toxic nuclide, which can cause internal exposure hazards after inhalation. The analysis of ²³⁷Np based on urine samples is an important method for routine monitoring, as well as a key method for studying the dose level of ²³⁷Np in the human body of professional workers. The pretreatment process of ²³⁷Np in large-volume urine samples, pre-concentration by co-precipitation, and the effect of TEVA resin separation and purification and electrodeposition on the chemical recovery of ²³⁷Np were systematically studied and discussed. The research results show that the chemical recovery of the experimental method can reach 88.5%, and the detection limit of the method is 2.55×10^-5 Bq/L. This analysis method meets the requirements of routine monitoring and is suitable for monitoring and evaluating ²³⁷Np in large-volume urine samples.