| 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,(4):71-72 |
| 名铁矿中三氧化二铝含量测定的方法研究 |
| THE METHOD INVESTIGATION ON ALUMINUM OXIDE ASSAY IN CHROMITES |
| 修订日期：2002-05-27 |
| DOI： |
| 中文关键词: 铬铁矿 三氧化二铝 容量法 六次甲基四胺 沉淀作用 |
| 英文关键词: Chromites, Aluminum Oxide,Volumetric titration, |
| 基金项目: |
| 赵琪 |
| 中国冶金地质勘查总局山东地质测试中心，济南250014 |
| 摘要点击次数: 1881 |
| 全文下载次数: 980 |
| 中文摘要: |
| 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。 |
| 英文摘要: |
| 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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