Determination of strontium-90 in water: collaborative study
Baratta, E.J.; Knowles, F.E.
Journal - Association of Official Analytical Chemists 56(1): 208-212
1973
ISSN/ISBN: 0004-5756 PMID: 4781037 Document Number: 63992
A procedure involving carbonate precipitation and purification with nitric acid was evaluated by 11 collaborators for the determination of strontium-90 in water. The ingrowth level of yttrium-90 is counted and this activity is used to calculate the strontium-90 activity present. The accuracy of the method ranged from 9 to 16% and within-laboratory precision ranged from 13 to 19% for strontium-90 levels of 28.2 to 99.6 pCi/L. A slight bias on the low side, caused by individual laboratory techniques, was not considered serious. The method has been adopted as official first action.