论文部分内容阅读
铀矿石在大多数情况下,含铀量很低,经处理和浸取后,可得到含铀量较高的产品和含铀品位低的残渣和空白溶液。对于含铀品位高的物质,其铀的最后测定一般采用U_2O_8的重量法。容量法一般是先将铀还原到四价,然后用标准氧化剂滴定。在过氯酸溶液中,用铅粒煮沸还原铀的方法,仍是一个较新的方法。阴极射线极谱和方波极谱的应用,提高了分析的灵敏度和准确度。在讨论螢光法测定铀的各种手续时,特别注意了熔融的操作及其要求。
In most cases, uranium ore contains very low amounts of uranium and, after treatment and leaching, products containing higher amounts of uranium and residues and blanks containing uranium can be obtained. For uranium containing high-grade material, the final determination of uranium generally U_2O_8 gravimetric method. The volumetric method generally first reduces uranium to tetravalent and then titrates with a standard oxidant. In the perchloric acid solution, the use of lead boiled uranium reduction method is still a relatively new method. The application of cathodic polarography and square wave polarography, to improve the sensitivity and accuracy of the analysis. In discussing various procedures for the determination of uranium by fluorescence, special attention was paid to the operation of melting and its requirements.