-
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.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:
- absorption spectrophotometrythioum5-FAsA-DBFseafood /
-
点击查看大图
计量
- 文章访问数: 2674
- HTML全文浏览量: 17
- PDF下载量: 259
- 被引次数: 0
下载: