二氧化鈾在鈾冶炼工艺过程中为一重要产物。其放置于含氧气氛中会部分氧化,测定它的四价和六价鈾相对含量是具有实际意义的。因为不論是直接使用或是作为制备其他鈾化物的原料,都需要知道这一数值。文献介紹直接測定混合鈾氧化物中二氧化物的方法很少,在一个样品中測定四价鈾同时亦能测定六价鈾的方法更为罕見。一般都是分别取样品測定后再計算它們的相对含量。例如文献[1]介紹了用磷酸溶解,亚鉄灵作指示剂,重鉻酸鉀标准液滴定 Uranium dioxide in uranium smelting process is an important product. It is partially oxidized when it is placed in an oxygen-containing atmosphere and it is of practical significance to measure its relative content of tetravalent and hexavalent uranium. This value needs to be known, either directly or as a raw material for the preparation of other uranium compounds. References There are few direct methods for the direct determination of dioxins in mixed uranium oxides. It is even more rare to measure uranium in one sample as well as hexavalent uranium. The samples are generally taken after the determination of the relative content of their calculation. For example, the literature [1] describes the use of phosphoric acid dissolved, sub-Ling for indicators, potassium dichromate standard titration