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测定高钒、铬、锰、钼、铜等材料中的铝,大量钒、铬、锰、钼、铜等严重干扰,必须采用繁杂的分离手续.冈田等发现,钒在有钡共存的苛性钠溶液中,能形成V/Ba=1/1.4～1.6的大颗粒沉淀,其组成经X—射线衍射鉴别为Ba_5Cl(VO_4)_3或Ba_3V_2O_8,据此使铝与钒分离,并用络合滴定法测定钒铁中的铝.我们对此反应的一些条件进行了试验,结果表明,除钒有此反应外,锰(Ⅱ)、钼(V)、 铬( Ⅲ、Ⅵ)等,也能与钡反应生成沉淀.我们此方法扩大应用于钒渣、铬铁、钼铁、锰铁及锰矿、铜合金中铝的测定,均取得了满意的结果.此法手续简单、快速,且准确度也较高,可用于生产的实际分中析.
Determination of high vanadium, chromium, manganese, molybdenum, copper and other materials in the aluminum, a large number of vanadium, chromium, manganese, molybdenum, copper and other serious interference must be complex procedures for separation. Okada found that vanadium coexistence of barium with caustic Sodium solution, a large particle precipitate of V / Ba = 1 / 1.4-1.6 can be formed, the composition of which is identified by X-ray diffraction as Ba_5Cl (VO_4) _3 or Ba_3V_2O_8, whereby aluminum and vanadium are separated and complexed titration The results show that besides this reaction, manganese (Ⅱ), molybdenum (V), chromium (Ⅲ, Ⅵ), etc. can also react with barium The reaction generated precipitate.Our method has been expanded for the determination of vanadium slag, ferrochrome, ferromolybdenum, ferromanganese and manganese ore, copper alloy, have achieved satisfactory results.This method is simple, fast, and the accuracy is also more High, can be used for the production of the actual sub-analysis.