| 2-(3,5-二溴-2-吡啶偶氮)-5-二乙氨基苯酚作络合滴定指示剂连续测定铁和铝 |
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| 引用本文： | 付佩玉,杨启霞.2-(3,5-二溴-2-吡啶偶氮)-5-二乙氨基苯酚作络合滴定指示剂连续测定铁和铝[J].分析化学,1999,27(9):1054-1057. |
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| 作者姓名： | 付佩玉 杨启霞 |
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| 作者单位： | 1. 山东建材工业学院应用化学系,济南,250022
2. 烟台建材学校 |
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| 摘 要： | 对2-(3,5-二溴-2-吡啶偶氮)-5-二乙氨基苯酚作铁(Ⅲ),铜(Ⅱ)的配位滴定指示剂进行了研究.在pH1.8～2.0时用EDTA标准溶液滴定铁(Ⅲ).在滴定铁(Ⅲ)后的溶液中,加入对铝过量的EDTA标准溶液,在pH3.8～4.0煮沸下,铝(Ⅲ)与EDTA生成稳定的络合物,过量的EDTA用硫酸铜标准溶液滴定,从而测定铝(Ⅲ).
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| 关 键 词： | 铁 铝 2-(3 5-二溴-2-吡啶偶氮)-5-二乙氨基苯酚 络合滴定 |
| 修稿时间： | 1998年10月19日 |
2- (3,5-Dibromo-2-pyridylazo) -5-diethylaminophenol as a Complexometric Titration Indicator for the Continuous Determination of Iron and Aluminium |
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| Fu Peiyu,Yang Qixia.2- (3,5-Dibromo-2-pyridylazo) -5-diethylaminophenol as a Complexometric Titration Indicator for the Continuous Determination of Iron and Aluminium[J].Chinese Journal of Analytical Chemistry,1999,27(9):1054-1057. |
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| Authors: | Fu Peiyu Yang Qixia |
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| Abstract: | 2-(3, 5-Dibromo-2-pyridylazo)-5-diethylaminophenol as a indicator for the continuous determination of iron and copper in complexometric titration was investigated. After the end-point of the titration of iron with EDTA standard solution at pH 1.8 - 2.0, the solution was boiled at pH 3.8-4.0, then the EDTA standard solution was added, the aluminium complex was formed with EDTA. The excessive EDTA was titrated with CuSO4 standard solution. The method has been applied to the determination of Iron and aluminium in cement and clay. |
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| Keywords: | Iron aluminium 2 -(3 5-dibromo-2-pyridylazo)-5-diethylaminophenol complexometric titration |
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