| 岩石及粉尘中游离二氧化硅的测定 |
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| 引用本文： | 李增文,杜庆洋.岩石及粉尘中游离二氧化硅的测定[J].商丘师范学院学报,2000,16(2):94-96. |
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| 作者姓名： | 李增文 杜庆洋 |
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| 作者单位： | 长春科技大学化学系,吉林,长春,130026 |
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| 摘 要： | 采用焦磷酸分离岩石及粉尘中的游离二氧化硅,再用氢氟酸-饱和氯化钾将分离出来的游离二氧化硅溶解,使硅形成K2SiF6沉淀.然后水解,应用氟离子选择性电极间接测定游离二氧化硅的含量,方法简便、准确、快速.
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| 关 键 词： | 焦磷酸 游离二氧化硅 电极法 |
| 文章编号： | 1008-2662(2000)02-0094-03 |
| 修稿时间： | 1999年8月10日 |
Determination of free state silicon dioxide in the rock and dust |
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| LI Zeng-wen,DU Qing-yang.Determination of free state silicon dioxide in the rock and dust[J].Journal of Shangqiu Teachers College,2000,16(2):94-96. |
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| Authors: | LI Zeng-wen DU Qing-yang |
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| Abstract: | This investigation is to analyse the free SiO 2 in rocks and dust by a fluoride-ion selective electrode(F-I.S.E)method.In this method,the free silicon can be separated with pyrophosphoric acid(H 4P 2O 7)firstly,and dissolved with hydrofluorde acid(HF),and then saturated with potassum chlorade(KCl).The precipitate of K 2SiF 6 can be formed.Therefore,the free SiO 2 can be determined indirectly by the F-I.S.E after the hydrolosis of the precipitate.The results obtained by this method indicate that the free SiO 2 in the rock or dust can be determined accurately,as compared with the weight method. |
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| Keywords: | pyrophosphoric free SiO 2 electrode method |
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