Simultaneous measurement of 89Sr and 90Sr in aqueous samples by liquid scintillation counting using the spectrum unfolding method.
نویسندگان
چکیده
Two radiostrontium isotopes, 89Sr and 90Sr, were measured simultaneously by liquid scintillation counter coupling with a full spectrum DPM counting protocol. Strontium was separated from the aqueous media by extraction chromatography using Sr-spec resin. Individual count rates were evaluated from quench correlation curves for 89Sr and 90Sr related with SIS and tSIE quench indicators. The method exhibited a counting efficiency of 95% for 89Sr and 92% for 90Sr within their full energy channels and gave highly precise results when the sample was counted within 4 h after strontium separation. Lower limits of detection were 37 mBq/l for 90Sr and 32 mBq/l for 89Sr with a 60 min counting time.
منابع مشابه
Measurement of 90sr in aqueous samples using liquid scintillation counting with full spectrum DPM method.
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ورودعنوان ژورنال:
- Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine
دوره 54 2 شماره
صفحات -
تاریخ انتشار 2001