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一、配 1000ml 浓度为 10Bq/ml 标准铀溶液,需分析纯 U 3 O 8 多少克 ? ( 已知: 238 U 、 235 U 、 234 U 的丰度分别为: 99.275% , 0.720% , 0.0054% ;比活度 S 0 分别为: 12.4Bq/mg , 79.4Bq/mg , 2.3×10 5 Bq/mg ; U 的平均匀原子量为 237.98 , O 的平均匀原子量为 16 )
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