| 1-(4-硝基苯基)-3-(2-吡嗪)-三氮烯的合成及与镉(Ⅱ)的显色反应 |
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| 引用本文： | 黄晓东,廖丽梅,卢丽娜.1-(4-硝基苯基)-3-(2-吡嗪)-三氮烯的合成及与镉(Ⅱ)的显色反应[J].分析试验室,2010,29(2). |
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| 作者姓名： | 黄晓东 廖丽梅 卢丽娜 |
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| 作者单位： | 闽江学院化学与化学工程系,福州,350108 |
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| 基金项目： | 福建省自然科学基金(2008J0232)项目资助 |
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| 摘 要： | 报道了显色剂1-(4-硝基苯基)-3-(2-吡嗪)-三氮烯化合物的合成及其与镉(Ⅱ)的显色反应。在非离子表面活性剂Triton X-100存在下,pH 10.5的Na2B4O7-NaOH的缓冲介质中,该试剂能与镉(Ⅱ)与发生显色反应,形成摩尔比为4∶1的黄棕色配合物,配合物在波长453 nm处有最大吸收峰,表观摩尔吸光系数ε为6.90×104L.mol-1.cm-1,镉(Ⅱ)质量浓度在0~0.56μg/mL范围内遵守比尔定律。用拟定方法测不同废水中的镉(Ⅱ)。
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| 关 键 词： | 1-（4-硝基苯基）-3-（2-吡嗪）-三氮烯 镉 显色反应 |
Synthesis of 1-(4-nitrophenyl)-3-(2-pyrazine)-triazene and its color reaction with cadmium |
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| HUANG Xiao-dong,LIAO Li-mei,LU Li-na.Synthesis of 1-(4-nitrophenyl)-3-(2-pyrazine)-triazene and its color reaction with cadmium[J].Chinese Journal of Analysis Laboratory,2010,29(2). |
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| Authors: | HUANG Xiao-dong LIAO Li-mei LU Li-na |
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| Institution: | Department of Chemistry and Chemical Eengineering;Minjiang University;Fuzhou 350108 |
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| Abstract: | This paper reports the synthesis of a new reagent 1-(4-nitrophenyl)-3-(2-pyrazine)-triazene and its color reaction with cadmium (Ⅱ). In the presence of the surfactant Triton X-100 and in the medium Na_2B_4O_7-NaOH of pH 10.5， the reagent reacts with cadmium(Ⅱ) to form a 4∶1 yellow-brown complex. The maximum absorption wavelength is at 453 nm. The molar absorptivity is 6.9×10~4 L·mol~(-1)·cm~(-1). Beer′s law is obeyed in the range of 0～0.56 μg/mL for cadmium(Ⅱ). The method has been applied to the determination of cadmium(Ⅱ) in waster water samples with satisfactory results. |
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| Keywords: | 1-(4-nitrophenyl)-3-(2-pyrazine)-triazene Color reaction |
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