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铁锰矿样品分解,以前普遍采用NaOH-Na_2O_2置银、镍坩埚中熔融,由于Na_2O_2中含有不均等量的CaO,对微量钙的测定结果影响较大,在铂皿中用氟氢酸、硫酸分解矿样能保证质量,但于大批生产中使用铂皿终究不便。铁锰矿分离手续比较繁杂,各单位采用:醋酸钠——铜试剂,六次甲基四胺——铜试剂,六次甲基四胺——硫脲(煮沸分解出硫与用铜试剂机理一样)来分离锰及重金属干扰离子,但铜试剂用量较难控
The samples of ferromanganese are decomposed. Silver-NaOH-Na 2 O 2 is usually placed in silver and melted in a nickel crucible. Since Na 2 O 2 contains an unequal amount of CaO, it has a great effect on the determination of trace calcium. Hydrogen fluoride and sulfuric acid Mineral samples can guarantee the quality, but in a large number of production use platinum dish after all inconvenience. Ferro Manganese separation procedures more complicated, all units: sodium acetate - copper reagent, hexamethylenetetramine - copper reagent, hexamethylenetetramine - thiourea (boiling decomposition of sulfur and copper reagents with the same mechanism ) To separate manganese and heavy metal interference ions, but the amount of copper reagents more difficult to control