| 铁—磺基水杨酸—二甲氧基羟基苯基荧光酮—TritonX—100体系的光度研究 … |
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| 引用本文： | 刘少民,潘教麦.铁—磺基水杨酸—二甲氧基羟基苯基荧光酮—TritonX—100体系的光度研究 …[J].岩矿测试,1999,20(2):120-123. |
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| 作者姓名： | 刘少民 潘教麦 |
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| 作者单位： | 1. 合肥经济技术学院加工工艺系,合肥,230052
2. 华东师范大学化学系,上海,200062 |
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| 摘 要： | 研究了在表面活性剂存在下，铁与新显色剂二甲氧基羟基苯基荧光酮（ＤＭＨＰＦ）的显色反应。在ｐＨ９．０～１０．５的氨性介质中，有磺基水杨酸（Ｓａｌ）存在下，形成Ｆｅ３＋ＳａｌＤＭＨＰＦＴｒｉｔｏｎＸ１００四元混配配合物，其最大吸收峰在５９０ｎｍ，测定波长选择６１０ｎｍ，表观摩尔吸光系数分别为１．３×１０５Ｌ·ｍｏｌ－１·ｃｍ－１和９．４×１０４Ｌ·ｍｏｌ－１·ｃｍ－１。配合物组成比ｎＦｅ３＋∶ｎＤＭＨＰＦ＝１∶２，Ｆｅ３＋的质量浓度为０～６００μｇ／Ｌ时符合比尔定律。以直接光度法测定工业硅和石灰石样品中微量铁，结果与标准值相符，５次测定的ＲＳＤ在０．６４％～２．４１％。
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| 关 键 词： | 铁 多元配合物 光度测定 羟基苯基荧光酮 |
| 修稿时间： | 1998-07-06 |
Study on Multi-component Complex of Fe-Sulphosalicylic Acid-DMH-PF-Triton X-100 by Spectrophotometric Method and Its Analytical Application |
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| LIU Shao-min,PAN Jiao-mai.Study on Multi-component Complex of Fe-Sulphosalicylic Acid-DMH-PF-Triton X-100 by Spectrophotometric Method and Its Analytical Application[J].Rock and Mineral Analysis,1999,20(2):120-123. |
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| Authors: | LIU Shao-min PAN Jiao-mai |
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| Abstract: | The color reaction of Fe3 with a new chromogenic agent dimethoxyhydroxyphenylflurone (DMHPF) has been investigated in presence of surfactants. The Fe3 SalDMHPFTritonX100 quaternary complex is formed in the medium of NH3H2O at pH 9.010.5 in presence of sulphosalicylic acid(Sal). The maximum absorption is at 590 nm, measuring wavelength is at 610 nm with apparent molar absorptivity of 1.3105 Lmol-1cm-1 and 9.4104 Lmol-1cm-1 respectively. The molar ratio of Fe3 and DMHPF (nFe3 nDMHPF) is 12. Beers law is obeyed in the range of 0600 g/L for Fe3 . The method has been applied to the directly spectrophotometric determination of trace Fe3 in industrial silicon and limestone. The results are in agreement with certified values with precision of 0.64% to 2.41% RSD(n=5).\=\= |
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| Keywords: | iron dimethoxyhydroxyphenylflurone multicomponent complex spectrophotometric determination\=\=\= |
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