影像科学与光化学 ›› 2016, Vol. 34 ›› Issue (4): 312-318.DOI: 10.7517/j.issn.1674-0475.2016.04.312

• 论文 • 上一篇    下一篇

靛蓝-F-组合探针光度法检测非质子有机溶剂中的微量水

王书献1, 蔚芳2, 孙欢鹤2, 董振明2   

  1. 1. 中国辐射防护研究院, 山西 太原 030006;
    2. 山西大学 化学化工学院, 山西 太原 030006
  • 收稿日期:2016-01-29 修回日期:2016-04-07 出版日期:2016-07-15 发布日期:2016-07-15
  • 通讯作者: 王书献
  • 基金资助:

    山西省自然科学基金项目(2013011040-6)资助

Indigo-F- as a Spectrophotometric Ensemble Probe for Trace Water in Aprotic Organic Solvents

WANG Shuxian1, YU Fang2, SUN Huanhe2, DONG Zhenming2   

  1. 1. China Institute for Radiation Protection, Taiyuan 030006,Shanxi,P.R.China;
    2. School of Chemisty and Chemical Engineering, Shanxi University, Taiyuan 030006, Shanxi,P.R.China
  • Received:2016-01-29 Revised:2016-04-07 Online:2016-07-15 Published:2016-07-15

摘要:

以靛蓝-F-为组合探针,建立了非质子有机溶剂(DMSO、THF、DMF、二恶烷、乙腈)中微量水的比色检测新方法。结果表明,F-加入靛蓝溶液后体系的颜色由蓝色变为黄绿色,进一步加入微量水之后,体系从黄绿色又变回蓝色,因而可作为一种变色探针实现对有机溶剂中微量水的裸眼识别检测。体系具有较高灵敏度,对DMSO、THF、DMF、二恶烷及乙腈中微量水的检测限分别为0.022%、0.043%、0.016%、0.34% 和0.015%。该方法实验操作简便、快速、灵敏、安全。实验结果表明,靛蓝与F-的结合比为1:2。利用核磁滴定方法对机理进行了探讨。

关键词: 光度法, 非质子有机溶剂, 微量水, 探针, 靛蓝

Abstract:

A simple spectrophotometric method for detecting trace water in aprotic organic solvents using Indigo-F- ensemble has been developed. In the presence of excess F- ions, the color of Indigo solution changes from blue to yellow-green. The resulting yellow-green solution changed to blue upon subsequent addition of trace water, which makes naked eye detection possible. Therefore, the system could be used as a chromogenic probe for detecting water in common aprotic organic solvents. Detection limits were of 0.022%, 0.043%, 0.016%, 0.34% and 0.015% for DMSO, THF, DMF, 1, 4-dioxane and acetonitrile, respectively. The sensing process was studied by 1HNMR titration experiments. The developed method is simple and easy to operate, and the cost of analysis is low.

Key words: spectrophotometric, aprotic organic solvents, trace water, probe, Indigo