华东师范大学学报(自然科学版) ›› 2004, Vol. 2004 ›› Issue (2): 69-71,8.

• 化学 • 上一篇    下一篇

新显色剂偶氮氟胂-DBF的合成及与钍的显色反应

徐 锋, 郝振文, 高美荣, 吴斌才   

  1. 华东师范大学 化学系，上海 200062
  • 收稿日期:2003-09-08 修回日期:2004-03-02 出版日期:2004-06-25 发布日期:2004-06-25
  • 通讯作者: 吴斌才

Study on the Synthesis of 5-FAsA-DBF and Its Chromogenic Reaction with Thorium

XU Feng, HAO Zheng-wen, GAO Mei-rong, WU Bing-cai   

  1. Department of Chemistry,East China Normal University,Shanghai 200062,China
  • Received:2003-09-08 Revised:2004-03-02 Online:2004-06-25 Published:2004-06-25
  • Contact: WU Bing-cai

摘要： 合成了新显色剂偶氮氟胂-DBF，并研究了其与钍的显色反应，在3.84 mol•L-1的高氯酸介质中，钍与该显色剂形成紫红色配合物，最大吸收波长为630 nm，表观摩尔吸光系数为1.63×105 L•mol-1•cm-1， 钍含量在每25 mL 0～40 μg范围内符合比尔定律，该方法简便，灵敏度高，选择性好，用于海产品中微量钍的测定，结果满意.

关键词: 吸光光度, 钍, 偶氮氟胂-DBF, 海产品, 吸光光度, 钍, 偶氮氟胂-DBF, 海产品

Abstract: A new chromogenic reagent 5-FAsA -DBF was synthesized and its colour reaction with thorium was studied， In a perchloric acid medium of 3.84 mol•L-1， 5-FAsA-DBF reacted with thorium to form a stable coordinate-complex， having its absorption maxima at 630 nm.Its molar absorptivity was found to be 1.63×105 L•mol-1•cm-1 .Beer’s law holds in the concentration range of 0～40 μg of Th(Ⅳ) per 25 mL of solution.The method has been apllied to determinate thorium in seafood with satisfactory results.

Key words: thioum, 5-FAsA-DBF, seafood, absorption spectrophotometry, thioum, 5-FAsA-DBF, seafood

中图分类号: