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Measurement of uranium isotopes in environmental samples by ICP-MS
Author(s): 
Pages: 270-274
Year: Issue:  4
Journal: Radiation Protection

Keyword:  同位素环境样品ICP-MS;
Abstract: 本文介绍了一种针对环境中水体、土壤及沉积物样品中铀同位素的ICP-MS测量方法.该方法通过萃取色谱法的应用对环境样品中的铀进行了分离纯化,实现了对环境中含量较少的234U、235U的同时、快速测量;所得234U、235U、238U方法探测限对土壤及沉积物而言分别为0.7 mBq/g、0.002 mBq/g、0.04 mBq/g,在水体样品测量中相应分别为0.000 1 Bq/L、6×10-7 Bq/L、1×10-5 Bq/L.进一步利用该方法对IAEA-443、IAEA-447、NIST-4357三种参考物质进行了测量,测量结果与参考值一致,平均回收率分别达到84.2%、93.4%、90.6%,验证了方法的有效性和准确性.
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