我们在使用氯化四苯钟测定钨的方法时,发现在钨、钼的分离问题上,主要在于利用五价钨与三价钼的价态差异,而不在于是否形成三元络合物,毛主席教导我们:差异就是矛盾。在分离问题上往往是找出元素互相之间在一定条件下的主要差异并加以利用。抓住这个主要矛盾,并相应地采取其他一些措施,从而能直接萃取钨与硫氰酸盐的络合物,可以有效地与大量钼、钒、铬、铁等分离,手续较简 We use chlorinated tetracycline in the determination of tungsten method and found that the separation of tungsten and molybdenum, the main lies in the use of pentavalent tungsten and trivalent molybdenum valence differences, not whether the formation of ternary complexes, Chairman Mao taught us: the difference is contradiction. In the separation problem, it is often to find out the main differences between the elements under certain conditions and make use of them. Seize this major contradiction, and accordingly take some other measures, which can be directly extracted tungsten and thiocyanate complexes can be effectively separated from a large number of molybdenum, vanadium, chromium, iron, simple procedures