A Solid-State Electrochemical Sensor for Determination of Effective Acidity of Aqueous Solutions with High Acidity
10.11895/j.issn.0253-3820.171088
- VernacularTitle:一种测定高酸度水溶液有效酸度的固态电化学传感器
- Author:
Shuang ZHOU
1
;
Shi Yu GUO
;
Yu YAN
;
Ying Jiang QU
;
Xiang Chun HE
Author Information
1. 辽宁师范大学化学化工学院
- Keywords:
o-Aminophenol;
o-Phenylenediamine;
Copolymer;
High acidity;
Wide range;
Hydrogen ion selective electrode
- From:
Chinese Journal of Analytical Chemistry
2018;46(1):81-87
- CountryChina
- Language:Chinese
-
Abstract:
A new all-solid state electrode modified with poly ( o-aminophenol-co-o-phenylenediamine ) film was prepared by cyclic voltammetry.The electrochemical response of the electrode to various solutions in the available acidity range of 1.00 × 10-12-10.0 mol/L was studied by cyclic voltammetry.The results showed that the reduction peak potentials and the available acidity of solution showed good linear relationship in 3 stages of 1.00×10-10-0.10 mol/L, 0.10-2.00 mol/L and 2.00-10.0 mol/L respectively, and the regression equations were Epc=0.0456lgC(H+)-0.295, Epc=0.0803c(H+)-0.309, and Epc=0.0278c(H+)-0.188, respectively.There were similar responses in the solutions of H2 SO4 , HNO3 and HClO4 in the concentration range of 1.00-8.00 mol/L.The preparation method of electrode was simple, and the determination range of available acidity was as wide as 1.0 ×10-10-10.0 mol/L, which laid the foundation for the development of solid-state electrochemical sensors for determination of acidity of high acidity solution.
