环境样品中~(90)Sr和~(239+240)Pu的联合分析

针对气溶胶、沉降灰、土壤、生物及淡水等环境样品中90Sr、239+240Pu的联合分析进行了流程设计,并通过实际样品的测量对流程进行了验证。结果表明:90 Sr分析流程的化学回收率为44.3%~90.2%,平均值为73.8%;239+240Pu分析流程的放化回收率为40.2%~104.3%,平均值为79.3%。在可给出单个样品化学(放化)回收率的前提下,该联合分析流程可以满足日常环境监测的要求。

Joint Analyses of 90 Sr and 239+240 Pu in the Environmental Samples

A procedure for joint analyses of ⁹⁰Sr and ^239+240Pu in aerosol, fallout, soil, biology and freshwater samples is reported. The procedure is validated by application to real samples. According to the measurement results, chemical recoveries of ⁹⁰Sr are in the range of 44.3%-90.2%, and the average is 73.8%; radiochemical recoveries of ^239+240Pu are in the range of 40.2%-104.3%, and the average is 79.3%. Under the premise that each sample has its own chemical (radiochemical) recovery, the procedure can satisfy the demand of the environmental monitoring.