| 灼烧除碳--重铬酸钾滴定法测定复合碳铁合金中TFe |
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| 引用本文： | 傅士刚,马清文,王俊秀,王艳芹,李龙霞.灼烧除碳--重铬酸钾滴定法测定复合碳铁合金中TFe[J].山东冶金,2013(5):42-43,46. |
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| 作者姓名： | 傅士刚 马清文 王俊秀 王艳芹 李龙霞 |
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| 作者单位： | 山东鲁丽钢铁有限公司,山东 寿光,262724 |
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| 摘 要： | 实验选择760℃灼烧去除复合碳铁合金中的游离碳后，试样以硫磷混酸溶解，加盐酸，用SnCl2还原大部分的Fe^3＋为Fe^2＋，再用TiCl3定量还原剩余的Fe^3＋，用钨酸钠指示还原终点；再以二苯胺磺酸钠为指示剂，用重铬酸钾标准溶液滴定TFe量，测定结果满意，相对标准偏差≤0.21%（n=6）。
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| 关 键 词： | 碳铁合金 TFe 灼烧除碳 重铬酸钾滴定法 |
Determination of the TFe in Composite Carbon Iron Alloy by Burning Carbon Removal and Potassium Dichromate Titration Method |
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| FU Shigang
,
MA Qingwen
,
WANG Junxiu
,
WANG Yanqin
,
LI Longxia.Determination of the TFe in Composite Carbon Iron Alloy by Burning Carbon Removal and Potassium Dichromate Titration Method[J].Shandong Metallurgy,2013(5):42-43,46. |
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| Authors: | FU Shigang MA Qingwen WANG Junxiu WANG Yanqin LI Longxia |
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| Affiliation: | (Shandong Luli Iron and Steel Co., Ltd., Shouguang 262724, China) |
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| Abstract: | After being burned at 760℃selected by test for removing free carbon in carbon iron alloy, the sample was dissolved by the mixture solution of sulfuric acid and phosphoric acid. Adding hydrochloric acid, the most Fe3＋was reduced to Fe2＋by SnCl2, and then the residual Fe3＋was reduced quantitatively by TiCl3, at the same time, sodium tungstate was used to indicate the reducing end. With sodium diphenylamine sulfonate as indicator, the TFe content was titrated by potassium dichromate standard solution. The satisfactory results were obtained and the relative standard deviation≤0.21%（n=6）. |
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| Keywords: | carbon iron alloy TFe burning carbon removal potassium dichromate titration method |
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