Citation: ZHOU Shuang, GUO Yu-Shi, YAN Yu, QU Jiang-Ying, HE Chun-Xiang. A Solid-State Electrochemical Sensor for Determination of Effective Acidity of Aqueous Solutions with High Acidity[J]. Chinese Journal of Analytical Chemistry, ;2018, 46(1): 81-87. doi: 10.11895/j.issn.0253-3820.171088 shu

A Solid-State Electrochemical Sensor for Determination of Effective Acidity of Aqueous Solutions with High Acidity

School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, China

Received Date: 11 July 2017
Revised Date: 12 October 2017

Fund Project: This work was supported by the National Natural Science Foundation of China (No. U16110114).

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 E_pc=0.0456lgC(H⁺)-0.295, E_pc=0.0803c(H⁺)-0.309, and E_pc=0.0278c(H⁺)-0.188, respectively. There were similar responses in the solutions of H₂SO₄, 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.
- o-Aminophenol,
- o-Phenylenediamine,
- Copolymer,
- High acidity,
- Wide range,
- Hydrogen ion selective electrode
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