| Fe-CAS-NH4F-OP体系高灵敏度分光光度法测定二氧化硅中微量铁 |
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| 引用本文： | 冯先进. Fe-CAS-NH4F-OP体系高灵敏度分光光度法测定二氧化硅中微量铁[J]. 光谱实验室, 1999, 16(3): 287-289 |
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| 作者姓名： | 冯先进 |
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| 作者单位： | 北京矿冶研究总院分析室,北京市西直门外文兴街1号,100044 |
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| 摘 要： | 在ＨＡｃ－ＮＨ４Ａｃ缓冲介质中，当有ＮＨ４Ｆ和乳化剂ＯＰ存在时，Ｆｅ与ＣＡＳ形成络合比为１：３的有色络合物，其最大吸收波长位于６５４．０ｎｍ，表观摩尔吸光系数为１．１８×１０＾５Ｌ·ｍｏｌ＾－１·ｃｍ＾－１，１－２０μｇ Ｆｅ／５０ｍＬ线性关系良好。该法用于二氧化硅中铁的测定，结果令人满意。
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| 关 键 词： | 分光光度法 铁 铬天青S 聚乙二醇辛基苯基醚 二氧化硅 |
Spectrophotometric Determination of Iron in silica oxide with Fe-CAS-NH4F-OP High Sensitive System |
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| FENG Xian-Jin. Spectrophotometric Determination of Iron in silica oxide with Fe-CAS-NH4F-OP High Sensitive System[J]. Chinese Journal of Spectroscopy Laboratory, 1999, 16(3): 287-289 |
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| Authors: | FENG Xian-Jin |
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| Abstract: | The presence of NH4F and surfactant p|octye polyethylene glycol phenyl (OP),iron forms sensitive colored complex with chrome azurol S(CAS).Composition ratio of the complex is 13.The maximum absorption wavelength is 654nm and its apparent molar absorptivity is 1.18105Lmol-1cm-1,following beer's law at range Fe 1-20g/50mL.The method has been applied to determination of iron in silica oxide with satisfactory results. |
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| Keywords: | Spectrophotometry Iron CAS OP Silica Oxide. |
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