| 快速测定硅铁中的硅量 |
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| 引用本文： | 巩卫东,李建军,宋顺茂.快速测定硅铁中的硅量[J].光谱实验室,2002,19(1):82-85. |
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| 作者姓名： | 巩卫东 李建军 宋顺茂 |
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| 作者单位： | 洛阳出入境检验检疫局,河南省洛阳市九都西路,471003 |
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| 摘 要： | 试样以硝酸、氢氟酸溶解，在3mol/L硝酸介质中，加入饱和硝酸钾，使硅酸生成氟硅酸钾沉淀，经过滤，洗涤，除去大部分游离酸，在硝酸钾－乙醇混合液存在下，用氢氧化钠中和残余游离酸，加入沸水使氟硅酸钾沉淀水解，以溴百里香粉蓝－酚红为指示剂，用氢氧化钠标准溶液滴定计算硅量，本方法操作简单，容易掌握，可大大节约分析时间，测定结果令人满意。
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| 关 键 词： | 硅铁 快速测定 硝酸 氢氟酸 氟硅酸钾 沉淀滴定 |
| 文章编号： | 1004-8138(2002)01-0082-04 |
| 修稿时间： | 2001年8月12日 |
Rapid Determination of Silicon In Fe-Si |
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| GONG Wei\|Dong,LI Jian\|Jun,SONG Shun\|Mao.Rapid Determination of Silicon In Fe-Si[J].Chinese Journal of Spectroscopy Laboratory,2002,19(1):82-85. |
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| Authors: | GONG Wei\|Dong LI Jian\|Jun SONG Shun\|Mao |
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| Abstract: | The sample was dissolved in nitric acid and hydrofluoric acid,then in 3mol/L nitric acid medium saturation KNO\-3 was added to form acid kalium\|fluosilicate deposit.After filtration and washing most dissociated acid was removed.In the existence of niter\|ethanol solution,sodium hydroxide was used to neutralize remains of acids,then impour boiling water was added to make kalium\|fluosilicate precipitate and hydrolyze.Using bromthymol blue phenol red was used as indicator and tetrated with sodium hydroxide.The method is easy and rapid with satisfactory results. |
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| Keywords: | Fe\|Si Silicon Rapid Determination |
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