大学化学 >> 2023, Vol. 38 >> Issue (8): 240-247.doi: 10.3866/PKU.DXHX202212017

化学实验 上一篇    下一篇

基于指示剂置换法的肝素含量测定——推荐一个分析化学综合设计性实验

张自品1,*(), 赵祖志2   

  1. 1 安徽中医药大学药学院, 合肥 230012
    2 安徽医科大学基础医学院, 合肥 230032
  • 收稿日期:2022-12-05 录用日期:2023-01-16 发布日期:2023-08-17
  • 通讯作者: 张自品 E-mail:zpzhang@ahtcm.edu.cn
  • 基金资助:
    安徽省自然科学基金面上项目(2008085MH293);安徽省高校自然科研项目重点项目(2022AH050459);安徽省2020年省级质量工程项目(2020MOOC265);安徽医科大学国际教育类教改项目(gjjyxm202011)

An Indicator Displacement Assay (IDA)-based Analytical Method for Heparin Detection: A Comprehensive Experiment in Analytical Chemistry

Zipin Zhang1,*(), Zuzhi Zhao2   

  1. 1 School of Pharmacy, Anhui University of Chinese Medicine, Hefei 230012, China
    2 School of Basic Medical Sciences, Anhui Medical University, Hefei 230032, China
  • Received:2022-12-05 Accepted:2023-01-16 Published:2023-08-17
  • Contact: Zipin Zhang E-mail:zpzhang@ahtcm.edu.cn

摘要:

介绍一个由科研成果转化的分析化学综合设计性实验“基于指示剂置换法的肝素含量测定”。本实验基于指示剂置换法的分析原理,以甲基紫精(MV2+)作为肝素受体,以8-羟基芘-1, 3, 6-三磺酸三钠盐(pyranine)作为光学指示剂,基于MV2+和肝素、pyranine之间结合能力的不同,利用加入肝素后pyranine-MV2+体系的紫外-可见光谱吸光度的变化,实现对肝素的定量分析。

关键词: 分析化学, 综合设计性实验, 指示剂置换法, 肝素

Abstract:

Herein we describe a comprehensive experiment designed for laboratory teaching of analytical chemistry. The experiment was developed based on the results of one of our recent studies. Methyl viologen (MV2+) and 8-hydroxypyrene-1, 3, 6-trisulfonic acid trisodium salt (pyranine) were used as the heparin receptor and optical indicator, respectively. Once heparin was introduced in the reaction system, competitive binding led to pyranine displacement, thereby resulting in changes in the UV-Vis absorbance of the pyranine/MV2+ system. Using the changes in UV-Vis absorption as the output signal, heparin concentration can be accurately measured using the IDA-based method.

Key words: Analytical chemistry, Comprehensive design experiment, Indicator displacement assay (IDA), Heparin