| 名铁矿中三氧化二铝含量测定的方法研究 |
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| 引用本文： | 赵琪.名铁矿中三氧化二铝含量测定的方法研究[J].地质与勘探,2002,38(4):71-72. |
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| 作者姓名： | 赵琪 |
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| 作者单位： | 中国冶金地质勘查总局山东地质测试中心,济南,250014 |
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| 摘 要： | 名铁矿试样经碱熔,直接分离铁,再酸化,中和后用六次甲基四胺沉淀铝与络合物,沉淀酸溶,用氟盐取代－EDTA容量法测定三氧化二铝。该法充分消除了铁的干扰,使滴定终点比DZG93－012（铬铁矿操作规程－氟盐取代）－EDTA容量法测定三氧化二铝）方法的滴定终点更清晰,准确,结果重现性好。
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| 关 键 词： | 铬铁矿 三氧化二铝 容量法 六次甲基四胺 沉淀作用 |
| 文章编号： | 0495-5331(2002)04-0071-02 |
| 修稿时间： | 2002年5月27日 |
THE METHOD INVESTIGATION ON ALUMINUM OXIDE ASSAY IN CHROMITES |
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| ZHAO Qi.THE METHOD INVESTIGATION ON ALUMINUM OXIDE ASSAY IN CHROMITES[J].Geology and Prospecting,2002,38(4):71-72. |
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| Authors: | ZHAO Qi |
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| Abstract: | The samples from chromites were firstly melted with base to separate iron out. After acidification and neutralization, hexamethylene-tetramine was added to precipitate aluminum so that it was separated from chromium. The precipitate was then dissolved in acid. Aluminum oxide was assayed by fluorinate replacement-EDTA volumetric titration. The interference of iron was eliminated by this method, which made the end point clearer and more accurate than DZG93-012 "The Operation Procedure for Chromites-Fluorhydric Acid Replacement-Assay of Aluminum Oxide by EDTA Volumetric Titration". The reproducibility was also better. This work compared this new method with DZG93-012. |
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| Keywords: | Chromites Aluminum Oxide Volumetric titration |
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