In this work, we present a study which tackles the stability of molecules involved in EURO-GANEX aqueous phase, the acetohydroxamic acid (AHA) and the sulphonated BTP (SO₃-Ph-BTP), taking into account factors such as the known AHA hydrolysis, acidity of the media, and the radiolysis of AHA and SO₃-Ph-BTP. To better understand the system, the radiolysis of AHA and SO₃-Ph-BTP in HNO₃ has been studied first separately, at low doses (up to 50 kGy) compared with those expected for the recycled organic phase. The concentration after exposure to gamma radiation of AHA and its hydrolysis products, as well as of SO₃-Ph-BTP, was measured for the first time by using Quantitative Raman Spectroscopy (QRS), showing that this technique can be used as a reliable tool for assessing the stability of these systems. In addition, the proton concentration and extraction efficiency of each assay were monitored and assessed. Our study extends the knowledge about the resistance to radiation of extractants involved in the EURO-GANEX aqueous phase, showing greater robustness when both molecules are irradiated together, and contributes not only to design reliable simulation strategies of the long-term EURO-GANEX process performance, but also to develop analysing tools for further processes implementations.

在这项工作中，我们提出了一项研究，该研究解决了涉及EURO-GANEX水相，乙酰氧肟酸（AHA）和磺化BTP（SO ₃ -Ph-BTP）的分子的稳定性，并考虑了已知AHA等因素水解，介质的酸度以及AHA和SO ₃ -Ph-BTP的辐射分解。为了更好地理解该系统，首先对低浓度（最高50 kGy）的HHA _3中的AHA和SO ₃ -Ph-BTP进行了辐射分解研究，与预期的循环有机相相比。暴露于伽马射线下的AHA及其水解产物以及SO ₃的浓度-Ph-BTP是使用定量拉曼光谱法（QRS）进行的首次测量，表明该技术可以用作评估这些系统稳定性的可靠工具。另外，监测和评估每个测定的质子浓度和提取效率。我们的研究扩展了EURO-GANEX水相中萃取剂对辐射的抵抗力的知识，当两个分子一起被辐照时显示出更高的鲁棒性，不仅有助于设计可靠的模拟EURO-GANEX工艺性能的策略，还可以开发用于进一步流程实现的分析工具。