97Tc制备方法
Preparation of 97Tc
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摘要: 为了采用同位素稀释质谱分析法准确测定环境中的痕量99Tc，需要以97Tc作稀释剂。采用天然Ru为辐照原料，建立了碱熔→水浸取→沉淀→萃取→阴离子交换的化学分离流程，确定了97Tc的制备工艺。该流程的化学产额大于70％，对Ru的去污因子大于10７。
Abstract: The most sensitive analytical technique of 99Tc is isotope dilution mass spectrometry with 97Tc as yield tracer. 97Tc was obtained by the irradiation of 2 g natural ruthenium metal. 97Tc is isolated from the sample by combined ionexchange chromatography, precipitation and ion-association solvent extraction technique. 99Tcm and 103Ru are used as tracers in this method. The chemical recovery of Tc is more than 70% and the decontamination factor is more than 10７.
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