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前言矿石中亚鉄的測定,可在隔絕空气(或用CO_2作保护)下溶解矿样后,以标准氧化剂溶液滴定亚鉄含量。这类方法,有氢氟酸法、盐酸法等;也可在氧化剂存在下溶解矿样后,用标准还原剂溶液滴定过量的氧化剂来測定,如A.B.(?)法(硫酸磷酸-五氧化二釩法)、磷酸-五氧化二釩法等。但是,这些方法都有缺陷。前者操作較困难,不易掌握;目前常用的氫氟酸法和盐酸法,由于溶解钛鉄矿石不易,不适宜于亚铁的测定。
Foreword Determination of ores in ores, after isolation of the air (or protected by CO_2) to dissolve the mineral sample, the standard oxidant solution is titrated to the sub-亚 content. Such methods, hydrofluoric acid, hydrochloric acid, etc .; also dissolved in the presence of an oxidizing agent ore samples, the standard reductant solution titration of excess oxidant to determine, such as AB (?) Method (sulfuric acid phosphoric acid - Vanadium law), phosphoric acid - vanadium pentoxide method. However, these methods all have drawbacks. The former is more difficult to handle, not easy to grasp; currently used hydrofluoric acid and hydrochloric acid method, due to the dissolution of titanium 鉄 ore is not easy, not suitable for the determination of ferrous.