【摘要】 介绍了采用萃取液问与α谱分析相结合的方法来测定样品中的钍铀含量。结果表明：该法制样简便，对α粒子的探测效率为９８％，分析误差小于士５％，本底计数小于１０ｃｐｍ，最小可探测的样品量为５ｍｇ／Ｌ．更多还原

【Abstract】 A method for assaying Th and U by mixing extyaction agent and liquid scintillation combined with α spectrum analysis was introduced. The method has such advantages as simple sample preparation, high detection efficiency for α- particles(～ 98%) and low background counting(< 10 cpm). The analytical error and the detection limit is < 5% and 5mg/l respectively.更多还原