【摘要】 <正> 水杨基萤光酮（SAF）可以作用于铀酰离子(UO²⁺)生成有色的二元络合物,其灵敏度甚低(ε₅₄₅=2.3×10⁴)且在水相中不稳定。本文比较了阳离子表面活性剂CTMAB、CPB、Zeph和非离子表面话性剂——乳化剂OP,在微酸性（pH5）介质中对这个二更多还原

【Abstract】 A method is developed for the determination of microamounts of U in aqueous solution by U-salicylfluorone-zeph-OP system. The absorption peak of the quarternary complex appears at 555 nm (ε=1.75×10~5). The color of the complex develops quickly stable for more than 5 hours. The method is suitable for determining U heigher than 0.000x% in geological samples.更多还原