biostudies-literatureWei CIntramural FDA HHS841-845https://www.ebi.ac.uk/biostudies/studies/S-EPMC11273253biostudies-literatureUnknown333A method for determining activity of ⁸⁹Sr and ⁹⁰Sr in a sample where ⁹⁰Sr and ⁹⁰Y are not in equilibrium is presented. The method consists of an experimental design and equations for accurately calculating activity of ⁸⁹Sr and ⁹⁰Sr based on ⁹⁰Y β particle counts and the total counts of β particles emitted from ⁸⁹Sr, ⁹⁰Sr, and ⁹⁰Y in a sample. The equations are derived based on chemical separation sequences, β particle counting sequences, and the Bateman equation. The presented method allows simultaneously obtaining the activity of ⁸⁹Sr and ⁹⁰Sr in a non-equilibrated ⁹⁰Sr/⁹⁰Y system without the need of Cerenkov counting.Journal of radioanalytical and nuclear chemistryA rapid method for simultaneously determining activity of <sup>89</sup>Sr and <sup>90</sup>Sr in a non-equilibrated <sup>90</sup>Sr/<sup>90</sup>Y system without Cerenkov counting.PMC11273253FD999999Wei CfalseA rapid method for simultaneously determining activity of <sup>89</sup>Sr and <sup>90</sup>Sr in a non-equilibrated <sup>90</sup>Sr/<sup>90</sup>Y system without Cerenkov counting.A method for determining activity of ⁸⁹Sr and ⁹⁰Sr in a sample where ⁹⁰Sr and ⁹⁰Y are not in equilibrium is presented. The method consists of an experimental design and equations for accurately calculating activity of ⁸⁹Sr and ⁹⁰Sr based on ⁹⁰Y β particle counts and the total counts of β particles emitted from ⁸⁹Sr, ⁹⁰Sr, and ⁹⁰Y in a sample. The equations are derived based on chemical separation sequences, β particle counting sequences, and the Bateman equation. The presented method allows simultaneously obtaining the activity of ⁸⁹Sr and ⁹⁰Sr in a non-equilibrated ⁹⁰Sr/⁹⁰Y system without the need of Cerenkov counting.2024-01-01T00:00:00Z2024 Feb2025-04-04T02:04:59.279Z2025-04-04T02:04:59.279ZS-EPMC112732533907072410.1007/s10967-023-09309-1