乏燃料后处理工艺热实验是新流程投入中试之前的必要环节,为配合先进无盐二循环工艺热实验的开展,在核燃料后处理放化实验设施开展了相关分析实验设备及方法的安装调试。工艺样品中游离酸的浓度是重要的分析指标之一。游离酸的传统分析方法是滴定法,但该方法需要加入相应的络合掩蔽剂及滴定剂,每个样品将产生100mL以上的废液,且操作较繁琐,耗费 Spent fuel reprocessing process thermal experiment is an essential part of the new process before it is put into pilot test. In order to cooperate with the advanced salt-free two-cycle process thermal experiment, the installation and adjustment of relevant analytical experiment equipment and methods are carried out in the post-treatment radiochemical experimental facilities of nuclear fuel . The concentration of free acid in the process sample is one of the important analytical indicators. Traditional analysis of free acid is titration, but the method requires the addition of the corresponding complex masking agent and titrant, each sample will produce more than 100mL of waste, and the operation is more cumbersome and costly