| 氧化偶氮胂Ⅲ褪色光度法测定钒 |
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| 引用本文： | 黄典文,梁盛前.氧化偶氮胂Ⅲ褪色光度法测定钒[J].岩矿测试,2001,20(2):157-158. |
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| 作者姓名： | 黄典文 梁盛前 |
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| 作者单位： | 广东工业大学化学工程系, |
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| 摘 要： | 在H2SO4介质中，V(Ⅴ)对偶氮胂Ⅲ有褪色作用，且褪色的程度与V(Ⅴ)的含量呈线性关系，由此建立了光度法测定V的新方法。方法的最大吸收波长为530nm，表观摩尔吸光系数为1.14×104L·mol-1·cm-1，V2O5的测定范围为0～10mg/L。方法用于铁矿石中微量钒的测定，其RSD(n=5)为0.53%～2.05%。
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| 关 键 词： | 钒 偶氮胂Ⅲ 褪色反应 分光光度法 |
| 文章编号： | 0254-5357(2001)02-0157-02 |
| 修稿时间： | 2000年8月29日 |
Spectrophotometric Determination of Vanadium by Bleaching Arsenazo Ⅲ |
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| HUANG Dian wen,LIANG Sheng qian.Spectrophotometric Determination of Vanadium by Bleaching Arsenazo Ⅲ[J].Rock and Mineral Analysis,2001,20(2):157-158. |
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| Authors: | HUANG Dian wen LIANG Sheng qian |
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| Abstract: | A new method for spectrophotometric determination of trace amount of vanadium based on decolorizing reaction of arsenazo Ⅲ oxidized by V(Ⅴ) in H2SO4 medium was established. The fading in color is directly in proportion to the amounts of vanadium. The maximum absorption is at 530 nm and the apparent molar absorptivity is 1.14×104 L·mol-1·cm-1.The linear range is 0～10 mg/L for V2O5.The method has been applied to the determination of trace vanadium in iron ores and the satisfactory results were obtained with precision of 0.53%～2.05% RSD(n=5). |
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