引言海水、河水、雨水和地下水(地热水)等环境水中,不管是人工放射性核素,还是天然放射性核素,含量都是很低,采用常规方法,分析一个核素往往需要采集几十甚至几百升水样,在野外采集如此多的样品,贮存和运输就要耗费很多的人力和物力,如果在实验室采用凝聚沉淀法进行浓集,还会遇到大体积沉淀泥浆分离的困难,为此,研 Introduction Marine water, river water, rainwater and groundwater (geothermal water) and other environmental waters, whether artificial or natural radionuclides, the content is very low, the use of conventional methods, the analysis of a nuclide often need to collect dozens or even Hundreds of liters of water samples collected in the field so many samples, storage and transportation will spend a lot of manpower and material resources, if coagulation precipitation in the laboratory for concentration, will encounter large volumes of sedimentation mud separation difficulties, To this end, research