2-羟基-5-氟-3-磺酸基苯基重氮氨基偶氦苯的合成 |
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引用本文: | 许琳,胡志勇.2-羟基-5-氟-3-磺酸基苯基重氮氨基偶氦苯的合成[J].天津化工,2009,23(2):27-28. |
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作者姓名: | 许琳 胡志勇 |
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作者单位: | [1]中北大学化工与环境学院,山西太原030051 [2]山西大同大学化学与化工学院,山西大同037009 |
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基金项目: | 山西省分析化学重点扶持学科基金;山西大同大学科学研究项目(2006K06). |
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摘 要: | 合成了2-羟基-5-氯-3-磺酸基苯基重氮氨基偶氮苯,并研究了它与镉(Ⅱ)的显色反应。实验表明,在Triton X-100的存在下,pH11.2的Na2B4O7-NaOH缓冲介质中,镉(Ⅱ)与之形成1:3的红色配合物,在528nm处有最大吸收。表观摩尔吸光系数为2.46×10^5L·mol^-1,cm^-1,镉(Ⅱ)在0~20μg/25mL范围内遵守比耳定律。方法应用于废水中微量镉的测定,结果令人满意。
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关 键 词: | 2-羟基-5-氯-3-磺酸基苯基重氮氨基偶氮苯 分光光度法 镉 |
Synthesis of 2-hydroxy-5-chloro-3- sulfobenzenediazoaminoazobenzene and its colour reaction with cadmium(Ⅱ) |
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Affiliation: | XU Lin,HU Zhi-yong(1. College of Chemistry Engineering and Environment, North University of China, Taiyuan030051, 2.College of Chemistry and Chemical engineering, Shanxi Datong University, Datong Shanxi037009) |
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Abstract: | A new reagent 2-hydroxy-5-chloro-3-sulfobenzenediazoaminoazobenzene (HCSDAA)has been synthesized and the color reaction of HCSDAA with cadmium (Ⅱ) has been studied.The results show that HSCDAA reacted with cadmium(Ⅱ)to form a stable red eomplex(3:1) in the presence of TritonX-100 at pH 11.2.The maximum absorption of the complex is at 528 nm ,and the apperent molar absrptivity is 2.46×10^5 L·mol^-1·cm^-1.Beer's law is obeyed in the range of 0-20 μg/25 mL for cadmium( Ⅱ).The method was applied to the determination of cadmium in waste water with satisfactory results. |
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Keywords: | 2-hydroxy-5-chloro-3-sulfobenzenediazoaminoazobenzene spectophotometry cadmium |
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