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金属锌中氧化锌的测定,文献虽有很多报导,但其中只有铵盐浸取法莸得了广泛的研究和应用。该方法主要是以铵盐作氧化锌的选择性溶剂,经浸取分离测定之。然而,由于金属锌在铵盐中也有较大的溶解度,所以虽经研究改进,似仍不适用于大量金属锌存在下少量氧化锌的测定。本文从寻找金属锌的选择性溶剂出发,研究了用氧化剂选择溶解金属锌以测定氧化锌的方案。试验指出:在无水乙醇介质中,结晶碘是选择溶解金属锌的有效溶剂。在此条
The determination of zinc in zinc metal, although the literature has many reports, but only the ammonium salt leaching method has been widely studied and applied. The method is mainly based on ammonium salt as a selective solvent of zinc oxide, after the determination of the leaching separation. However, due to the large solubility of metallic zinc in ammonium salts, it is still not suitable for the determination of a small amount of zinc oxide in the presence of a large amount of metallic zinc though it has been improved. In this paper, starting from the search for a selective solvent of zinc metal, the choice of zinc oxide as oxidant to dissolve zinc was studied. The experiment points out: In the absolute ethanol medium, the crystalline iodine is the effective solvent that chooses to dissolve the zinc metal. In this article