| 滴定分析法测定铁矿石中铁含量 |
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| 引用本文： | 张洪波,田鹏,秦雨,张璇,陶玫蓉,孙晓尧.滴定分析法测定铁矿石中铁含量[J].沈阳师范大学学报(自然科学版),2011,29(4):546-548. |
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| 作者姓名： | 张洪波 田鹏 秦雨 张璇 陶玫蓉 孙晓尧 |
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| 作者单位： | 1. 沈阳师范大学实验中心,沈阳,110034
2. 沈阳师范大学化学与生命科学学院,沈阳,110034 |
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| 基金项目： | 国家自然科学基金资助项目(21073123); 辽宁省教育厅科学研究资助项目(LT2010097,LS2010153); 沈阳市科技局科学研究资助项目(F10-205-1-11) |
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| 摘 要： | SnCl2-TiCl3-K2Cr2O7滴定分析法是试样用盐酸加氟化钠加热分解,让有铁的氧化物及硅酸盐都变成氧化铁进入溶液中。先用氯化亚锡将大部分三价铁离子还原成二价铁,以钨酸钠为指示剂,用三氯化钛将剩余的三价铁还原成二价铁至生成"钨蓝",再用重铬酸钾标准溶液氧化至蓝色消失,加入硫磷混合酸以二苯胺磺酸钠为指示剂,用重铬酸钾标准液滴定。通过调节不同的还原酸度,还原温度,试剂用量和溶样时间,对其最佳实验条件进行了优化。用SnCl2-TiCl3-K2Cr2O7滴定分析法测定铁矿石中铁含量,相对标准偏差在0.68%~2.6%之间,回收率在91.9%~97.9%之间,方法准确可靠。
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| 关 键 词： | 滴定分析法 铁矿石 铁含量 |
Measuring iron content in iron ore by titrimetric analysis |
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| ZHANG Hong-bo,TIAN Peng,QIN Yu,ZHANG Xuan,TAO Mei-rong,SUN Xiao-yao.Measuring iron content in iron ore by titrimetric analysis[J].Journal of Shenyang Normal University: Nat Sci Ed,2011,29(4):546-548. |
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| Authors: | ZHANG Hong-bo TIAN Peng QIN Yu ZHANG Xuan TAO Mei-rong SUN Xiao-yao |
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| Institution: | ZHANG Hong-bo1,TIAN Peng2,QIN Yu2,ZHANG Xuan2,TAO Mei-rong2,SUN Xiao-yao2(1.Experimental Center,Shenyang Normal University,Shenyang 110034,China,2.College of Chemistry and Life Science,China) |
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| Abstract: | In SnCl2-TiCl3-K2Cr2O7 titrimetric analysis,the iron ore was thermally decomposed under hydrochloric acid plus sodium fluoride,so that iron oxides and silicates had become iron oxide into the solution.First of all,ferric ions was reduced to ferrous iron by the stannous chloride,other ferric iron was reduced to ferrous iron by titanium trichloride to generate tungsten blue with sodium tungstate as the indicator.Next,the solution was titrated by potassium dichromate standard solution until the blue was disapp... |
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| Keywords: | titrimetric analysis iron ore iron content |
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