title: Time optimization of90Sr determinations: sequential measurement of multiple samples during decay of90Y.
abstract: This work presents an optimized method for the determination of multiple samples containing90Sr when its daughter90Y is measured after chemical separation and in sequence,i.e.during its decay. Consequently the measurement times will increase for each subsequent sample, since there has been a longer time for decay before measurement. Compared to a previously published approach, when90Y is measured during its ingrowth, the gain in total analysis time (time for ingrowth+ summation of measurement times) is not that large, particularly not for low background instruments. However, results for a large part of the samples can be delivered earlier.
authors.affiliation: CBRN Defence and Security, Swedish Defence Research Agency (FOI), Cementvägen 20, 901 82 Umeå, Sweden.
authors.forename: Stina Holmgren
authors.initials: SH
authors.lastname: Rondahl
authors.affiliation: CBRN Defence and Security, Swedish Defence Research Agency (FOI), Cementvägen 20, 901 82 Umeå, Sweden.
authors.forename: Annika
authors.initials: A
authors.lastname: Tovedal
authors.affiliation: CBRN Defence and Security, Swedish Defence Research Agency (FOI), Cementvägen 20, 901 82 Umeå, Sweden.
authors.forename: Oscar
authors.initials: O
authors.lastname: Björnham
authors.affiliation: CBRN Defence and Security, Swedish Defence Research Agency (FOI), Cementvägen 20, 901 82 Umeå, Sweden.|Department of Chemistry and Chemical Engineering, Nuclear Chemistry, Chalmers University of Technology, Kemivägen 4, 412 58 Göteborg, Sweden.
authors.forename: Henrik
authors.initials: H
authors.lastname: Ramebäck
keywords: 89Sr; 90Sr; 90Y; Detection limit; Interferences; MDA; Optimization