论文部分内容阅读
目前,测定硅锰、锰铁、金属锰、锰矿等试样中的锰,都是用磷酸溶解试样的“三价锰”方法,我们做了一点改进:用自行设计的异型小烧杯(见附图),在小体积下完成测定,收到了节约试剂,加快了分析速度的效果. 硅锰、锰铁、金属锰称样0.1克,加磷酸5～6毫升,盐酸、硝酸各1毫升,加热溶解,当液面上出现少许白烟时取下,加硝酸铵1.5克,摇匀后稍冷,趁热加水10～15毫升,用约0.035N亚铁铵标准溶液滴定. 锰矿、高锰渣称样0.1克,加盐酸3毫升,加热至试样全部或大部溶解,加磷酸5毫升,以下同上述操作步骤. 烧杯的造型 (1)底小才能节约试剂,但不能过小,否则容易翻倒;
At present, the determination of manganese and manganese, ferromanganese, manganese metal, manganese and other samples of manganese, are dissolved with phosphoric acid sample “trivalent manganese ” method, we made a little improvement: with their own design shaped small beaker (See photo), in a small volume to complete the determination, has received a saving reagent, speed up the analysis of the effect of silicomanganese, ferromanganese, manganese, said 0.1 grams, add phosphoric acid 5 to 6 ml, hydrochloric acid, nitric acid each 1 Ml, heated to dissolve, when the surface appears a little white smoke removed, add 1.5 grams of ammonium nitrate, Shake a little cold, while hot water 10 ~ 15 ml titrated with about 0.035N ferrous ammonium standard solution.Mineral, High manganese slag, said 0.1 g, add hydrochloric acid 3 ml, heated to the sample all or most dissolved, add phosphoric acid 5 ml, the same with the above steps. Beaker shape (1) Bottom small to save reagents, but not too small , Otherwise easy to fall over;