| 4-氨基偶氮苯的分光光度法测定 |
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| 引用本文： | 李引,叶曦雯,牛增元,张清智,高永刚,李晶莹.4-氨基偶氮苯的分光光度法测定[J].青岛科技大学学报,2012(4):341-344. |
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| 作者姓名： | 李引 叶曦雯 牛增元 张清智 高永刚 李晶莹 |
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| 作者单位： | 青岛科技大学环境与安全工程学院;山东省出入境检验检疫局 |
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| 基金项目： | 国家质量监督检验检疫总局科研项目(2006IK085) |
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| 摘 要： | 研究了邻甲氧基苯酚分光光度法测定4-氨基偶氮苯方法的可行性。通过对显色过程中重氮化反应的酸度、时间及氨基磺酸铵用量,偶合反应的介质pH值、温度、稳定时间等影响因素的研究,确定了测定的最佳条件为:在室温下,4-氨基偶氮苯和亚硝酸钠在pH值为2.56时,反应生成重氮盐;在pH值为10.25时,重氮盐与邻甲氧基苯酚偶联显色,重氮化反应时间为30min,显色效果最佳。在优化条件下,在1～50mg.L-1范围内,偶合产物在最大吸收波长505.5nm处吸光值的增加与4-氨基偶氮苯浓度的增加呈良好的线性关系,检出限为(3σ)3mg.L-1。该方法操作简单易行,可有效地应用于4-氨基偶氮苯的快速检测。
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| 关 键 词： | 4-氨基偶氮苯 重氮化偶合反应 邻甲氧基苯酚 显色反应 |
Spectrophotometric Determination of 4-Aminoazobenzene |
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| LI Yin,YE Xi-wen,NIU Zeng-yuan,ZHANG Qing-zhi,GAO Yong-gang,LI Jing-ying.Spectrophotometric Determination of 4-Aminoazobenzene[J].Journal of Qingdao University of Science and Technology:Natutral Science Edition,2012(4):341-344. |
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| Authors: | LI Yin YE Xi-wen NIU Zeng-yuan ZHANG Qing-zhi GAO Yong-gang LI Jing-ying |
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| Affiliation: | 1(1.College of Environment and Safety Engineering,Qingdao Universty of Science and Technology,Qingdao 266042,China; 2.Shandong Entry-Exit Inspection and Quarantine Bureau,Qingdao 266002,China) |
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| Abstract: | The possibility of determining 4-aminoazobenzene by guaiacol spectrophotometric method was studied.The obtained optimum conditions for reaction of 4-aminoazobenzene and sodium nitrite were room temperature and pH=2.56,and the optimum conditions for reaction between diazo salt and guaiacol were pH=10.25 and reaction time 30min.Under above conditions,the absorbance at 505.5nm increased proportionally with the increase of 4-aminoazobenzene concentration in the range of 1—50 mg·L-1,and the detection limit(3σ)was 3 mg·L-1.This method could be effectively applied to determine the level of 4-aminoazobenzene. |
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| Keywords: | 4-aminoazobenzene diazo-coupling reaction guaiacol chromogenic reaction |
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