论文部分内容阅读
有氯化铵存在时,桔酸可作为沉淀剂定量沉淀铀(Ⅵ)与钍。本文探讨了pH,棓酸量与氯化铵量对沉淀作用的影响。铀与桔酸生成的沉淀可溶于热水中,冷却时又能定量析出。如果将pH控制在3.0左右,热溶液中加入微过量的棓酸以沉淀钍,经过两次沉淀可将钍与铀定量的分离。本法能用于从铀、钍、稀土的混合溶液中连续测定钍与铀(Ⅵ)。
In the presence of ammonium chloride, citric acid can be used as precipitant to quantitatively precipitate uranium (Ⅵ) and thorium. In this paper, the effects of pH and pH on precipitation were investigated. The precipitate formed by uranium and orange acid is soluble in hot water and quantitatively precipitates when cooled. If the pH is controlled at about 3.0, adding a slight excess of acid to the hot solution to precipitate thorium, thorium and uranium quantitative separation after two precipitations. This method can be used for the continuous determination of thorium and uranium (Ⅵ) from mixed solutions of uranium, thorium and rare earths.