| 硫酸亚铁铵容量法测定铬矿石中氧化亚铁 |
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| 引用本文： | 秦立俊,郑光煜,王通胜,姜郁,夏新媛.硫酸亚铁铵容量法测定铬矿石中氧化亚铁[J].山东化工,2011,40(9):46-48. |
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| 作者姓名： | 秦立俊 郑光煜 王通胜 姜郁 夏新媛 |
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| 作者单位： | 连云港出入境检验检疫局,江苏连云港,222042 |
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| 摘 要： | 铬矿石中亚铁含量的测定对于了解矿石的性质和类型等具有很重要的地质和经济意义。试样用硫-磷混酸溶液在(210±2)℃下加热分解。分解过程中,样品中的亚铁离子被溶液中的Mn3+氧化,溶液中过量的Mn3+用硫酸亚铁铵标准溶液进行滴定,从而测定出样品中氧化亚铁的含量。用标准物质进行检验,结果与标准值相符,相对标准偏差RSD(n=9)为1%～3%。可成功地应用于铬矿石中氧化亚铁(<20%)含量的检测。
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| 关 键 词： | 三价锰盐 硫-磷混酸 铬矿石 硫酸亚铁铵容量法 氧化亚铁 |
Ammonium Ferrous Sulfate Titrimetric Determination of Ferrou Iron in Chrome Ore |
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| QIN Li-jun,ZHENG Guang-yu,WANG Tong-sheng,JIANG Yu,XIA Xin-yuan.Ammonium Ferrous Sulfate Titrimetric Determination of Ferrou Iron in Chrome Ore[J].Shandong Chemical Industry,2011,40(9):46-48. |
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| Authors: | QIN Li-jun ZHENG Guang-yu WANG Tong-sheng JIANG Yu XIA Xin-yuan |
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| Affiliation: | ( Lianyungang Entry - Exit Inspection and Quarantine Bureau, Lianyungang 222042, China) |
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| Abstract: | Determing the content of ferrous oxide is of great importance to know the structure and performance of chrome ore. To determine the content of ferrous oxide in chrome ore by titration with ammonium iron（II） sulfate. The method used trivalent mangnese to oxide the ferrous ion of the sample at （210 ± 2 ）℃ in sulphur - phosphorus acid solution, the excess trivalent mangnese was titrated by ammonium iron （II） sulfate as to calculate the content of ferrous oxide in the sample. This method could determine the ferrous oxide（ 〈 20% ） in chrome ore quickly and simply ,the RSD（ n = 9） was 1% - 3%. |
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| Keywords: | trivalent mangnese solution sulphur - phosphorus acid chrome ore ammonium ferrous sulfate ferrous oxide |
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