| 磷钨钒杂多酸-TMBPS电荷转移配合物光度法测定钒 |
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| 引用本文： | 狄俊伟,屠一锋,吴莹,刘德启.磷钨钒杂多酸-TMBPS电荷转移配合物光度法测定钒[J].光谱学与光谱分析,2002,22(5):800-802. |
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| 作者姓名： | 狄俊伟 屠一锋 吴莹 刘德启 |
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| 作者单位： | 苏州大学化学化工系,江苏,苏州,215006 |
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| 基金项目： | 江苏省教育厅自然科学基金，苏州大学青年基金资助 |
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| 摘 要： | 提出了一种基于形成磷钨钒杂多酸 3,3′,5 ,5′ 四甲基联苯胺 -丙磺酸 (TMBPS)电荷转移配合物的分光光度法测定钒 (Ⅴ )的新方法 ,其最大吸收波长为 45 0nm ,摩尔吸光系数 2 74× 10 4 L·mol-1·cm-1,线性范围 0 0 2～ 1μg·mL-1。采用浮选反萃取分光光度法 ,可提高测定灵敏度 ,其表观摩尔吸光系数增至 3 10×10 5L·mol-1·cm-1。
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| 关 键 词： | 磷钨钒杂多酸 测定 钒 电荷转移配合物 3 3′ 5 5′－四甲基联苯胺－丙磺酸 TMBPS |
| 文章编号： | 1000-0593(2002)05-0800-03 |
| 修稿时间： | 2001年5月22日 |
Spectrophotometric Determination of Vanadium(Ⅴ) Through the Formation of a Tungstovanadophosphate-TMBPS Charge Transfer Complex |
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| DI Jun-wei,TU Yi-feng,WU Ying,and LIU De-qi.Spectrophotometric Determination of Vanadium(Ⅴ) Through the Formation of a Tungstovanadophosphate-TMBPS Charge Transfer Complex[J].Spectroscopy and Spectral Analysis,2002,22(5):800-802. |
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| Authors: | DI Jun-wei TU Yi-feng WU Ying and LIU De-qi |
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| Institution: | Department of Chemistry and Chemical Engineering, Suzhou University, Suzhou 215006, China. |
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| Abstract: | A new spectrophotometric method was developed for the determination of vanadium(V). The method was based on the formation of tungstovanadophosphate-3,3',5,5'-tetramethylbenzidine-N-propanesulfonic (TMBPS) charge transfer complex. The spectrophotometric measurements were directly carried out at 450 nm and the apparent molar absorptivity was 2.74 x 10(4) L.mol-1cm-1. The linear range of the determination was 0.02-1 microgram.mL-1. The sensitivity was enhancement with a flotation-extraction preconcentration method and the apparent molar absorptivity was 3.10 x 10(5) L.mol-1cm-1. |
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