| 褪色光度法测定水中痕量铜 |
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| 引用本文： | 王明,边敏,李丽娜,于红晖. 褪色光度法测定水中痕量铜[J]. 科技成果管理与研究, 2010, 0(12): 76-77,80. DOI: 10.3772/j.issn.1673-6516.2010.12.013 |
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| 作者姓名： | 王明 边敏 李丽娜 于红晖 |
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| 作者单位： | [1]四平市科学技术研究院,吉林四平136000 [2]大连市金州区大连前程高级中学,辽宁大连116111 [3]吉林省东丰县第二中学,吉林东丰136300 [4]吉林师范大学化学院,吉林四平136000 |
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| 摘 要： | 在表面活性剂存在下及硫酸介质中，70℃恒温水浴中，铜（Ⅱ）催化溴酸钾氧化亚甲基蓝褪色。据此建立了测定痕量铜的方法。铜（Ⅱ）浓度的线性范围为0-0．1mg．L^-1，最大吸收波长为660nm，摩尔吸光系数为2．2×10^4L．g^-1．cm^-1，检出限为3．82×10^-6g·L^-1。方法简单快速、选择性好，用于测定水中铜含量时，测定结果与AAS法的结果相近，所得结果的RSD值均小于3．2％，回收率在99—104％。
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| 关 键 词： | 光度法 催化氧化褪色反应 铜（Ⅱ） 亚甲基蓝 溴酸钾 |
Photometric Determination of Copper Traces in Water by Catalytic Oxidative Color-fading |
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| WANG Ming,Bian Min,LI Li-na,YU Hong-hui. Photometric Determination of Copper Traces in Water by Catalytic Oxidative Color-fading[J]. Management and Research on Scientific & Technological Achievements, 2010, 0(12): 76-77,80. DOI: 10.3772/j.issn.1673-6516.2010.12.013 |
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| Authors: | WANG Ming Bian Min LI Li-na YU Hong-hui |
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| Affiliation: | 1 .Siping Academy of Science and Technology, Siping 136000, China;2. Dalian QianCheng Senior Middle School, Dalian 116110, China; 3. The Second Senior Middle in Dongfeng County, Dongfeng 136300, China, 4. Jilin Normal University Chemistry Institute, Siping 136000, China) |
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| Abstract: | In the presence of CTMAB and in a dilute sulfuric acid medium, the oxidation of methylene blueness by bromated was catalyzed by trace amounts of Cu（ Ⅱ ） heated at 70℃ in a water bath resulted in a color-fading of the methylene blueness. It was found that the intensity of color-fading（AA） kept a linear relationship with the concentration of Cu（ Ⅱ ） ion in the range from 0 to 0.1 mg per L of solution. The absorbance was measured at 660 nm which is the absorption maxima wavelength of methylene blueness. The moore absorbency modulus was 2.2×10^4L.g^-1.cm^-1. Detection limit of this reaction was found to be 3.82×10^6L.g^-1.cm^-1. The results by this method to analyze the content of copper in water were similar to those obtained by the AAS method, and the RSD＇s value were less than 3.2 % and the recoveries were in the range of 99-104 % . |
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| Keywords: | photometry catalytic oxidative color-fading reaction copper （ Ⅱ ） ion methylene blueness potassium bromate |
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