| 偶氮胂Ⅲ褪色光度法测定铬 |
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| 引用本文： | 邹本义,王春华,李祥,杨丽娟,刘君,翟庆洲. 偶氮胂Ⅲ褪色光度法测定铬[J]. 福建分析测试, 1997, 0(2) |
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| 作者姓名： | 邹本义 王春华 李祥 杨丽娟 刘君 翟庆洲 |
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| 作者单位： | 鞍山钢铁学院应化系，鞍山建材中专，鞍山钢铁学院，鞍山钢铁学院，鞍山钢铁学院，吉林大学化学系 鞍山 114002，鞍山 114014，鞍山 114002，鞍山 114002，鞍山 114002，长春 130023 |
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| 摘 要： | 在6mol·L~(_1)HNO_3介质中,Cr(Ⅵ)与偶氮胂Ⅲ进行氧化褪色反应,该褪色反应的表现摩尔吸光系数∑_(523nm)=3.7×10~5L·mol~(-1)·cm~(-1)。铬(Ⅵ)在0～1.8×10~(-4)g/L范围内符合比尔定律。本法用于土样中痕量铬的测定,结果满意。
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| 关 键 词： | 偶氮胂Ⅲ 铬(Ⅵ) 土样 褪色光度法 |
Spectrophotometric Determination of Chromium (Ⅳ) Based on the Color-Fading Reaction of Arsenazo Ⅲ with Chromium (Ⅳ) |
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| Zou Benyi. Spectrophotometric Determination of Chromium (Ⅳ) Based on the Color-Fading Reaction of Arsenazo Ⅲ with Chromium (Ⅳ)[J]. Fujian Anal Ysis & Testing, 1997, 0(2) |
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| Authors: | Zou Benyi |
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| Abstract: | The color-fading reaction of arsena20 Ⅲ with chromium (Ⅵ) was studied. The results showed that arsenazo Ⅲ can be oxidized and Cr (Ⅵ) faded it in the medium of nitric acid. Based on this reaction, a new method for the spectrophotometric determination of chromium (Ⅵ) has been developed. The apparent molar absorptivity is 3. 7×10~5L·mol~(-1)·cm~(-1) at 528nm. Beer's law is obeyed over the range of 0～l. 8×10~(-4)g/L of chromium (Ⅵ). The method has been already used to determine trace amounts of chromium in soil samples with good results. |
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| Keywords: | arsenazo Ⅲ chromium (Ⅵ) soil fade-spectrophotometry |
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