一种快速分析土壤样品中90Sr的方法

为了对核设施及周边环境的放射性污染水平进行有效监测，需要对大量土壤样品中的⁹⁰Sr进行分析。本工作以对锶有特效选择性的Sr·Spec树脂为主要分离纯化材料，结合浸取或全溶解预处理、草酸盐沉淀以及时间校准法与双标记法液闪测量，建立了快速分析土壤样品中⁹⁰Sr的方法。全流程对Sr的化学回收率约为60%，分析时间小于6h，方法的最小可探测比活度为8Bq/kg。

A Rapid Method for Radiochemical Analysis of 90Sr in Soils

⁹⁰Sr in many soil samples should be analyzed, so that radioactive pollution level in nuclear facilities and its surrounding environment can be surveyed efficiently. In this paper, a rapid radioanalytical method of ⁹⁰Sr in soils was developed. The main procedures consist of pretreatment, oxalate precipitation, Sr·Spec resin chromatographic separation, and radioactivity determination by time correction or dual labeling method using liquid scintillation spectrometry. Typically, a sample can be analyzed in 6 h. The chemical yield is about 60%, and the minimum detectable activity by this technique is about 8 Bq/kg.