使用塑料膜离子选择性电极电位滴定法测定盐酸麻黄碱

Potentiometric determination of ephedrine hydrochloride using plastic membrane ion-selective electrode.

作者信息

Zareh M M, Issa Y M, Shoukry A F, Shohaib R E

机构信息

Chemistry Department, Faculty of Science, Zagazig University, Egypt.

出版信息

J Chem Technol Biotechnol. 1993;58(4):371-6. doi: 10.1002/jctb.280580410.

DOI:10.1002/jctb.280580410

PMID:7764360

Abstract

A plastic membrane electrode based on phenylephrine-tetraphenylborate ion association shows a Nernstian response to both ephedrinium (Ep+) and silver (Ag+) cations over the concentration ranges 2 x 10(-5)-10(-1) M and 10(-5)-10(-1) M for Ep+ and Ag+, respectively. The performance characteristics of the electrode were investigated. The electrode proved to be an excellent potentiometric sensor for the determination of Ep-hydrochloride in its pure solutions and pharmaceutical preparations using the extrapolation method and potentiometric titration using a standard solution of AgNO3.

摘要

基于去氧肾上腺素-四苯基硼酸离子缔合物的塑料膜电极，在麻黄碱离子（Ep+）浓度范围为2×10⁻⁵ - 10⁻¹ M以及银离子（Ag+）浓度范围为10⁻⁵ - 10⁻¹ M时，分别对Ep+和Ag+阳离子呈现能斯特响应。研究了该电极的性能特征。结果表明，该电极是一种出色的电位传感器，可通过外推法测定纯溶液和药物制剂中的盐酸麻黄碱，也可使用硝酸银标准溶液进行电位滴定。