| 应用等色染料离子对的褪色反应测定中草药中硒（Ⅳ）的含量 |
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| 引用本文： | 于朝云,丁良.应用等色染料离子对的褪色反应测定中草药中硒（Ⅳ）的含量[J].中国医药导报,2008,5(4):31-32. |
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| 作者姓名： | 于朝云 丁良 |
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| 作者单位： | 河北大学医学部,河北保定,071000 |
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| 摘 要： | 目的：建立测定中草药中硒的一种新的催化动力学光度法。方法：在酸性介质中，硒（Ⅳ）能催化H2O2氧化溴酚蓝-丁基罗丹明B的褪色反应，硒（Ⅳ）含量在0～5μg/L范围内与褪色反应速率成正比。结果：样品经HNO3—HClO4消化后直接测定硒（Ⅳ）的含量，该方法具有良好的选择性和准确度。结论：该法可用于中药材中硒的测定，结果令人满意。
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| 关 键 词： | 等色染料离子对 催化 硒 |
| 文章编号： | 1673-7210(2008)02(a)-031-02 |
| 修稿时间： | 2007年12月7日 |
Determination of amounts of selenium(Ⅳ) in Chinese herbal drugs using the decolorant reaction of isochromatic dye ion-pair |
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| YU Zhao-yun,DING Liang.Determination of amounts of selenium(Ⅳ) in Chinese herbal drugs using the decolorant reaction of isochromatic dye ion-pair[J].China Medical Herald,2008,5(4):31-32. |
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| Authors: | YU Zhao-yun DING Liang |
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| Institution: | (Hebei University Health Science Center, Baoding 071000, China ) |
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| Abstract: | Objective： To describe a new spectrophotometric method for the determination of selenium （Ⅳ） in Chinese herbal drugs. Methods： The selenium（Ⅳ） catalyzed oxidation of bromophenol blue-butylrhodamine B with H202 in nitric acid medium. And as the redox reaction proceeds, the purple color was decolorized. The decolorant reaction showed a good linear relationship with the amounts of selenlum（Ⅳ）. The detection range of the method was 0-5 μg/L.Results：Samples after digesting of HNO3-HClO4 determined the amounts of selenium （Ⅳ）. The method was selectivity and precise. Conclusion： It is applied to the determination of selenium in Chinese herbal drugs and with satisfactory results. |
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| Keywords: | Isochromatic dye ion-pair Catalytic kinetic method Selenium |
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