| 邻甲氧基苯基重氮氨基偶氮苯与铜显色反应的研究及应用 |
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| 引用本文： | 杨敏思,何秀容.邻甲氧基苯基重氮氨基偶氮苯与铜显色反应的研究及应用[J].四川理工学院学报(自然科学版),1995(4). |
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| 作者姓名： | 杨敏思 何秀容 |
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| 作者单位： | 四川轻化工学院基础部 |
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| 摘 要： | 本文研究了邻甲氧基苯基重氮氨基偶氯苯（ｏ－ＭＤＡＡ）与铜（Ⅱ）的显色反应。试验表明：在ＴｒｉｔｏｎＮ－１０１存在下及ｐＨ１０．５～１１．１的Ｎａ２Ｂ４Ｏ７－ＮａＯＨ缓冲介质中，铜（Ⅱ）和ｏ－ＭＤＡＡ形成１：３的红色配合物，其最大吸收波长位于５４０ｎｍ，对比度１１０ｎｍ，表观摩尔吸光系数ε５４０＝１．１１×１０５Ｌ．ｍｏｌ－１．ｃｍ－１。铜量在０～４．０μｇ／１０ｍｌ范围内符合比尔定律。试验了２０余种共存离子的影响，与巯基棉或萃取分离结合，测定了铝合金及花生中的微量铜，结果满意。
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| 关 键 词： | 铜 邻甲氧基苯基重氮氨基偶氮苯 分光光度法 |
A STUDY ON THE PHOTOMETRIC DETERMINATION OF COPPER(Ⅱ)WITH O-METHOXYBENZENDIAZOAMINOAZOBENZ AND ITS APPLICATION |
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| Yang Minsi,He Xiurong.A STUDY ON THE PHOTOMETRIC DETERMINATION OF COPPER(Ⅱ)WITH O-METHOXYBENZENDIAZOAMINOAZOBENZ AND ITS APPLICATION[J].Journal of Sichuan University of Science & Engineering:Natural Science Editton,1995(4). |
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| Authors: | Yang Minsi He Xiurong |
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| Institution: | Dept.of Basics Courses Sichuan Institute of Light Ind.& Chem.Tech.Zigong 643033 |
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| Abstract: | The sensitive colour reaction of Cu2+ with o-methoxydiazoaminoazobenzene(o-MDAA)is studied in the paper.It is shown that the red comPlex is formed in PH 10.5～ 11.1 Na2B4O7-NaOH medium and in the presence of triton N-101.The molar ratio of Cu2+ to o-MDAA in the complex is 1:3.λmax of the complex is at 540nm and the apparent molar absorptivity is 1.11×105L.mol-1.cm-1.Beer's law is obeyed up to 4.0μg/10ml for Cu2+.The interference and its eliminations are studied. This method is applied to determine trace ammounts of copper in aluminium alloy and peanut with satisfactory results. |
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| Keywords: | copper o-methoxydiazoaminoazobenzene spectrophotometry |
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