中华医学超声杂志

应用化学 ›› 1994, Vol. 0 ›› Issue (5): 91-94.

• 研究论文 • 上一篇    下一篇

苯偶氮罗丹宁类显色剂的合成及其与铜的显色反应

王伦, 史好新, 孙春玲, 王忠义   

  1. 安徽师范大学化学系 芜湖 241000
  • 收稿日期:1993-11-30 修回日期:1994-04-17 出版日期:1994-10-10 发布日期:1994-10-10
  • 基金资助:
    国家自然科学基金资助项目

Synthesis of Rhodanine Color Reagents and the Color Reaction with Cu(Ⅱ)

Wang Lun, Shi Haoxin, Sun Chunlin, Wang Zhongyi   

  1. Department of Chemistry, Anhui Normal University, Wuhu 241000
  • Received:1993-11-30 Revised:1994-04-17 Published:1994-10-10 Online:1994-10-10

PDF

479

被引次数

5

摘要： 报道5-(4'-氯-2'-羧基苯偶氮)罗丹宁(2),5-(4'-溴-2'-羧基苯偶氮)罗丹宁(3)和5-(4'-碘-2'羧基苯偶氮)罗丹宁(4)的合成及在水溶液中的离奶常数Ka1和Ka2研究它们与铜的显色反应,在弱酸性时,3种显色剂与铜均形成配位比为2:1的配合物,2与铜的显色反应,当铜浓度在0～2.5μg/mL范围内符合比耳定律。用分光光度法测定了合金中铜的含量。

关键词: 苯偶氮罗丹宁, 分光光度法, 铜

Abstract: Three rhodanine color reagents 5-(4'-chloro-2'-carboxylphenylazo)-rhodanine,5-(4'-bromo-2'-carboxylphenylazo )-rhodanine and 5-(4'-iodo-2'-carboxylphenylazo)-rho-danine have been synthesized. The dissociation constants of the color reagents Ka1 and Ka2 are given. The color reactions of them with Cu(Ⅱ) are studied.The molar ratio of Cu(Ⅱ) to the color reagents are found to be 1:2. The Beer's law is obeyed in the range of 0～2.5μg/mL for Cu(Ⅱ). The chloro reagent has been used for copper determination in alloy samples with satisfactory results.

Key words: rhodanine, spectrophotometry, copper

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