| 粉煤灰中微量铬的光度法测定 |
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| 引用本文： | 夏畅斌,何湘柱,黄念东,史红文.粉煤灰中微量铬的光度法测定[J].光谱学与光谱分析,2003,23(1):205-206. |
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| 作者姓名： | 夏畅斌 何湘柱 黄念东 史红文 |
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| 作者单位： | 湘潭工学院环境工程与化工新技术研究所,湖南,湘潭,411201 |
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| 基金项目： | 原煤炭工业部科技发展项目 ( 97- 368)资助 |
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| 摘 要： | 在HNO3 介质中利用Cr2 O2 - 7氧化偶氮胂Ⅲ的褪色反应 ,对粉煤灰中的痕量铬进行测定。结果表明 ,在 3 2mol·L- 1 的硝酸介质中褪色反应具有高的灵敏度 ,反应产物的最大吸收波长为 52 0nm ,摩尔吸光系数为1 9× 1 0 6 L·mol- 1 ·cm- 1 。铬 (Ⅵ )含量在 0 0～ 40 0 μg·L- 1 范围内服从比耳定律。该法用于测定粉煤灰中的铬 ,得到了满意的结果。
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| 关 键 词： | 分光光度法 偶氮胂Ⅲ 铬(Ⅵ) 粉煤灰 |
| 文章编号： | 1000-0593(2003)01-0205-02 |
| 修稿时间： | 2000年4月10日 |
Spectrophotometric Determination of Trace Chromium in Fly Ash |
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| XIA Chang-bin,HE Xiang-zhu,HUANG Nian-dong and SHI Hong-wen Institute of Environmental Eng. and Chemical Hi-tech. Xiangtan Polytechnic University,Xiangtan ,China.Spectrophotometric Determination of Trace Chromium in Fly Ash[J].Spectroscopy and Spectral Analysis,2003,23(1):205-206. |
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| Authors: | XIA Chang-bin HE Xiang-zhu HUANG Nian-dong and SHI Hong-wen Institute of Environmental Eng and Chemical Hi-tech Xiangtan Polytechnic University Xiangtan China |
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| Institution: | Institute of Environmental Eng. and Chemical Hi-tech. Xiangtan Polytechnic University, Xiangtan 411201, China. |
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| Abstract: | In HNO3 medium the fading reaction of arsenazo III oxidated with Cr2O7(2-) was used as to determine trace Cr in fly ash containing Cr. The results show that the fading reaction has high sensitivity in the medium of 3.2 mol.L-1 nitric acid, the molar absorptivity of 3.9 x 10(6) L.mol-1.cm-1 at 520 nm, and Beer's law is obeyed for Cr (VI) in the range of 0.0-40.0 micrograms.L-1. Contents of Cr in fly ash were determined with satisfactory results. |
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