Rapid method for determination of 90Sr in biological samples by liquid scintillation counting after separation on synthesized column

Publication date: October 2018

Source: Journal of Environmental Radioactivity, Volumes 193–194

Author(s): Xiangyin Kong, Lei Dang, Xianzhang Shao, Liangliang Yin, Yanqin Ji

Abstract

A simple, rapid and cost-efficient method for determination of activity concentration of ⁹⁰Sr in biological samples with an extraction chromatographic column (crown ether on teflon powder) and following counted by liquid scintillation counting was developed in this paper. The column retained most of ⁹⁰Sr while almost all of matrix ions were removed during rinsing steps with 8M nitric acid and finally ⁹⁰Sr was eluted with deionized water, the chemical recovery of strontium is greater than 60%, almost all of matrix ions were removed by the procedure we reported. Finally the uncertainty was evaluated and minimum detectable activity of this method is 1.28Bq/kg.

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