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Updated: May 12, 2026

Automated 90Sr Separation and Preconcentration in a Lab-on-Valve System at Ppq Level
Published on: June 6, 2018
A quick liquid scintillation counting technique for analysis of ⁹⁰Sr in environmental samples
1Institute of Nuclear Energy Research, Atomic Energy Council, No. 1000, Wunhua Road, Jiaan Village, Longtan Township, Taoyuan County 32546, Taiwan, Republic of China. jjwang@iner.gov.tw
Abstract:
In this study, to improve the problem of waiting for the growth of (90)Y for Cerenkov counting and save the time of (90)Sr analysis, an organic cocktail sample was counted by a liquid scintillation counting system immediately after the purification of (90)Sr without waiting for the growth of (90)Y. The chemical separation and the measurement procedures for (90)Sr radioactivity analysis can be completed in 24h. In order to verify the performance of the improved method, the activity of (90)Sr in six environmental reference samples was determined after radiochemical purification with a crown-ether resin column, and subsequent measurement by both the Cerenkov and the organic cocktail liquid scintillation counting methods. The results revealed that the organic cocktail liquid scintillation counting was quicker and had higher efficiency and lower minimum detectable activity (MDA) than the Cerenkov counting.
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