| 析相光度法测定铁(Ⅲ)的研究 |
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| 引用本文： | 张振新,谢媛媛,石影.析相光度法测定铁(Ⅲ)的研究[J].光谱学与光谱分析,1999,19(2):241-243. |
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| 作者姓名： | 张振新 谢媛媛 石影 |
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| 作者单位： | 淮北煤炭师范学院化学系,235000,淮北 |
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| 摘 要： | 本研究了铁（Ⅲ）－ＰＥＧ（聚乙二醇－２０００）－铬锖Ｒ－Ｎａ２ＳＯ４体系的上光度法并应用于测定Ｆｅ（Ⅲ）。最适酸并为４．５￣６．５（ＮａＡｃ－ＨＡｃ）缓冲溶液，其络合物的最大吸收位于５６０ｎｍ，表观摩尔吸光系数为５．３６×１０＾４Ｌ·ｍｏｌ＾－１·ｃｍ＾－１，Ｆｅ（Ⅲ）浓度在０￣４μｇ范围内服从比尔定律，铁与铬菁Ｒ形成组成为１：２的稳定络合物。该方法用于蔡叶中铁的测定，获得了满意的结果。
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| 关 键 词： | 铁测定 光度法 析相法 |
Spectrophotometric Determination of Iron Using Eriochrome Cyanine R As Extractant with Phase-Separation |
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| Zhenxin ZHANG,Yuanyuan XIE,Ying SHI.Spectrophotometric Determination of Iron Using Eriochrome Cyanine R As Extractant with Phase-Separation[J].Spectroscopy and Spectral Analysis,1999,19(2):241-243. |
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| Authors: | Zhenxin ZHANG Yuanyuan XIE Ying SHI |
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| Institution: | Department of Chemistry, Huaibei Coal Teacher's College, 235000 Huaibei. |
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| Abstract: | Spectrophotometric determination of iron by using eriochrome cyanine R as extractant and color-developing agent in organic solvents was studied. The complex was extracted by PEG phase from the water solutions of pH4.5-6.5 (NaAc-HAc). The maximum absorption of the complex is at 560 nm and the molar absorptivity is 5.36 x 10(4) L x mol(-1) x cm(-1). Beers law was obeyed in the range of 0-40 microg Fe. Iron and eriochrome cyanine R formed a stable complex with a molar ratio of 1:2. The proposed method has been applied to the determination of copper in aluminium alloys with satisfactory results. |
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| Keywords: | Iron determination Spectrophotometry Extraction |
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