稀土硅铁合金及镁硅铁合金中硅量的测定

Determination of Silica Content in Rare Earth Ferrosilicon Alloy and Rare Earth Ferrosilicon Magnesium Alloy

摘要: 试样以硝酸、氢氟酸溶解，使硅转化为氟硅酸，加入饱和硝酸钾生成氟硅酸钾沉淀，加沸水使氟硅酸钾水解释放出氢氟酸，用氢氧化钠标准溶液滴定，进行稀土硅铁合金及镁硅铁合金中硅量的测定，取得了较好的效果.

Abstract: The samples were dissolved in the mixture of HNO_3-HF. Saturated KNO3 were added in K2SiF6. After K2SiF6 hydrolyzed with boiling water, the content of silica can be determined with NaOH standard solution by titration.