| 1. | Preparation of high - purity silica from silicofluoric acid 由氟硅酸制取高纯二氧化硅 |
| 2. | Potassium fluorosilicate 95 % min 氟硅酸钾 |
| 3. | Chemicals used for treatment of water intended for human consumption - hexafluorosilicic acid 人类生活用水处理用化学制品.六氟硅酸 |
| 4. | Chemicals used for treatment of water intended for human consumption - hexafluorosilicic acid 人生活用水的水处理用化学物质.六氟硅酸 |
| 5. | Determination of silicon content in ferrosilicon for export . the potassium fluosilicate volumetric analysis 出口硅铁中硅含量的测定.氟硅酸钾容量法 |
| 6. | Chemicals used for treatment of water intended for human consumption - hexafluorosilicic acide ; german version en 12175 : 2001 饮用水处理用化学品.六氟硅酸 |
| 7. | Hexafluorosilic acid for industrial use . determination of available fluorine content . potentiometric method after disitllation 工业用六氟硅酸.可用氟含量的测定.蒸馏后电位测定法 |
| 8. | Test methods of crystalline layered sodium disilicate - potassium fluosilicate volumetric methods for determination of silica dioxide content 层状结晶二硅酸钠试验方法氟硅酸钾容量法测定二氧化硅含量 |
| 9. | Abstract : the iodine is extracted from fluorosilicic acid solution by carbon tetrachloride after the iodine ion is oxidized to the free iodine . the oxidant b is adopted through sifting oxidants 摘要对氟硅酸提碘过程的氧化剂进行选择研究,结果表明,对碘回收率而言氧化剂b较好。 |
| 10. | As quartz fraction in loess is separated by the tedious process of etching with fluorosilicic acid for 6 days , 20ml 30 % fluorosilicic acid per gram , not only the feldspars in loess could be removed completely , but also less quartz could be etched away in loess 溶蚀实验表明,用40 hf溶蚀40min对石英的损失太大,不适合黄土中石英的分离。用30氟硅酸( 20ml冶)溶蚀约6天,分离黄土中的石英颗粒,既可以溶蚀掉长石颗粒,又对石英的损失较小。 |