| 偶氮胂Ⅲ分光光度法测定铬（Ⅲ）的研究 |
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| 引用本文： | 何先莉.偶氮胂Ⅲ分光光度法测定铬（Ⅲ）的研究[J].北京工业大学学报,1994,20(2):73-76. |
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| 作者姓名： | 何先莉 |
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| 作者单位： | 北京工业大学化学与环境工程学系 |
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| 摘 要： | 研究了偶氮胂与铬（Ⅲ）的显色反应，结果表明：加热煮沸５ｍｉｍ，配合物形成完全配合物最大吸收波长６１０ｎｍ，摩尔吸光系数为２．１×１０￣４Ｌ／ｍｏｌ·ｃｍ，铬（Ⅲ）的测定范围在０～６０μｇ／５０ｍＬ内符合朗白－比耳定律。本法回收率９５％～１００％。应用于天然木和工业废水中铬（Ⅲ）的直接测定。
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| 关 键 词： | 铬，偶氮胂Ⅲ，分光光度法 |
Study on the Spectrophotometry Arsenazo(Ⅲ) Determination of Cr(Ⅲ) |
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| He Xianli.Study on the Spectrophotometry Arsenazo(Ⅲ) Determination of Cr(Ⅲ)[J].Journal of Beijing Polytechnic University,1994,20(2):73-76. |
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| Authors: | He Xianli |
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| Abstract: | The Chromogenic reation of Cr(Ⅲ) with arsenazo Ⅲ have been studied.The results show that complex formation reation can be complete by heating at 100℃ for 5 min. The most absorption band of the complex lies at 610 nm. The apparent molar absorptivity is 2.1× 10~4L mol. cm. Lambert-Beer law is obeyed for Cr(Ⅲ) in the concentration range 0~60 mg/50 mL. The range of the recovery is 95%~100%. The metbod has been applied to the determination of Cr(Ⅲ) in water and industriat water water. |
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| Keywords: | Cheomium aesenazo Ⅲ sepectrophotometry |
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