容量法测定某莫桑比克钛矿样品中的锰含量
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摘要
本实验中,试样用混合酸溶解,在磷酸介质及加热条件下,用高氯酸将二价锰氧化至三价,以N-苯代邻氨基苯甲酸为指示剂,用对苯二酚(氢醌)标准溶液滴定,三价锰被还原至二价,溶液由粉红色突变为稳定的明黄色,以锰的滴定度计算得到锰含量。采用本方法对某莫桑比克钛矿样品的锰含量进行多次平行测定,测定标准偏差(RSD,n=11)为3.59%,加标回收率为99.71%～100.27%,满足生产要求。
In this experiment, ore sample was dissolved with mixed acid. In phosphoric acid medium, under heating condition, divalent manganese was oxide to trivalent with perchloric acid. Applied N-phenyl generation anthranilic acid as indicator, titrated with hydroquinone(hydroquinone) standard solution, trivalent manganese reduced to bivalent, and the solution color was changed from pink to yellow, the content of manganese was calculated with titration degree. This method was used to determine the manganese content in a sample of mozambique titanium ore, the standard deviation(RSD, n=11) was 3.59%, the standard recovery was 99.71%～100.27%.
In this experiment, ore sample was dissolved with mixed acid. In phosphoric acid medium, under heating condition, divalent manganese was oxide to trivalent with perchloric acid. Applied N-phenyl generation anthranilic acid as indicator, titrated with hydroquinone(hydroquinone) standard solution, trivalent manganese reduced to bivalent, and the solution color was changed from pink to yellow, the content of manganese was calculated with titration degree. This method was used to determine the manganese content in a sample of mozambique titanium ore, the standard deviation(RSD, n=11) was 3.59%, the standard recovery was 99.71%～100.27%.
引文
[1]贺和岭,周航.莫桑比克太特省钛铁矿地质特征及成因探讨[J].中国科技博览,2012(21):8-9.
[2]王卿,回寒星,周长祥,等.ICP-AES内标法测定钛铁矿中铜钴镍锰钒铬[J].山东国土资源,2012,28(5):33-36.
[3]赵婷.用ICP-AES法测定钛精矿中氧化钙、氧化镁、铬、锰元素的应用[C].中国金属学会铁合金分会,2013:751-754.
[4]胡宏卫,陆伟星.ICP-AES内标法测定钛铁中钛、铝、锰和铜[J].梅山科技,2008(2):53-54.
[5]《岩石矿物分析》编写组.岩石矿物分析(第3版第1分册)[M].北京:地质出版社,1991:362-363.
[6]杨芬,卢业友.氢醌滴定法测定锰铁中锰[J].冶金分析,2012,32(2):73-75.
[7]金娅秋,朱利亚,安中庆,等.电位滴定法测定银、铜、镍、锰合金中的锰[J].贵金属,2009,30(4):33-36.
[8]詹伟雄,赖馥馨.高氯酸-对苯二酚快速测定高锰钢中的锰[J].云南冶金,2004,33(1):56-57.
[9]冯茂盛.滴定法快速测定高锰钢中锰[J].冶金分析,2001,21(2):70-71.
[10]北京矿冶总院分析室.矿石及有色金属分析手册[M].北京:冶金工业出版社,1989:99-100.
[2]王卿,回寒星,周长祥,等.ICP-AES内标法测定钛铁矿中铜钴镍锰钒铬[J].山东国土资源,2012,28(5):33-36.
[3]赵婷.用ICP-AES法测定钛精矿中氧化钙、氧化镁、铬、锰元素的应用[C].中国金属学会铁合金分会,2013:751-754.
[4]胡宏卫,陆伟星.ICP-AES内标法测定钛铁中钛、铝、锰和铜[J].梅山科技,2008(2):53-54.
[5]《岩石矿物分析》编写组.岩石矿物分析(第3版第1分册)[M].北京:地质出版社,1991:362-363.
[6]杨芬,卢业友.氢醌滴定法测定锰铁中锰[J].冶金分析,2012,32(2):73-75.
[7]金娅秋,朱利亚,安中庆,等.电位滴定法测定银、铜、镍、锰合金中的锰[J].贵金属,2009,30(4):33-36.
[8]詹伟雄,赖馥馨.高氯酸-对苯二酚快速测定高锰钢中的锰[J].云南冶金,2004,33(1):56-57.
[9]冯茂盛.滴定法快速测定高锰钢中锰[J].冶金分析,2001,21(2):70-71.
[10]北京矿冶总院分析室.矿石及有色金属分析手册[M].北京:冶金工业出版社,1989:99-100.