Development of HCl-free solid-phase extraction combined with ICP-MS/MS for rapid assessment of difficult-to-measure radionuclides. Part I: Selective measurement of 93 Zr and 93 Mo in concrete rubble

摘要: A new HCl-free chromatographic separation procedure has been developed for sequential of Zr and Mo from concrete matrices selective measurement 93Zr 93Mo by ICP-MS/MS. The recoveries greater than 90% concretes could be achieved. condition was optimized complete suppression interferences 93Nb peak tailing abundant isotopes in matrices. removal verified radio-contamination-free used as a sample matrix blank. Method detection limits 1.7 mBq g− 1 0.2 Bq were achieved for, respectively, the interference factor Nb (equivalent to decontamination radiochemical separation) order 105, abundance sensitivity 10─8, indicating that method is reliable verifying presence ultralow concentrations 93Mo. present suitable rapid assessment radioactivity inventory rubble.