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本文提出测定硅化钼和钼铁中钼的两种快速容量法。第一法、EDTA 直接滴定法:基于在 pH=3～4时,Mo~6+与 EDTA 生成稳定化合物。因此可借 PAN与络合剂铜混合指示剂,用 EDTA 直接滴定。操作手续:称硅化钼0.2克置铂皿中,溶于5毫升氢氟酸,滴加硝酸(1:1)至溶解完全。然后加5毫升硝酸蒸干两次。残渣用5毫升氨水润湿,加热,将带沉淀的溶液移入200毫升容量瓶中,以水稀释至刻度,
This paper presents two rapid volumetric methods for the determination of molybdenum in molybdenum and molybdenum iron. The first method, EDTA direct titration: based on the pH = 3 ~ 4, Mo ~ 6 + and EDTA to generate stable compounds. So by PAN and complexing agent copper mixed indicator, with EDTA direct titration. Operating procedures: said 0.2 grams of molybdenum silicide Platinum dish, dissolved in 5 ml of hydrofluoric acid, nitric acid was added dropwise (1: 1) to dissolve completely. Then add 5 ml of nitric acid and evaporate twice. The residue was moistened with 5 ml of ammonia water, heated, and the solution with the precipitate was transferred to a 200 ml volumetric flask, diluted with water to the mark,