Preparation and properties of a novel all-solid-state ammonium ion selective electrode
LIU Si-yang1, YAN Jia-bao1, XIA Zheng-hai2, WANG Kun2, LI Jing1, HU Jie1, ZHAO Zhen-yue1, JIA biao1
1. Hubei Province Key Laboratory of Coal Conversion and New Carbon Materials, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, China; 2. SINOPEC-SK(Wuhan) Petrochemical Company Limited, Wuhan 430082, China
Abstract: Polyaniline is electrodeposited onto a glassy carbon electrode as solid contact layer by cyclic voltammetry method,and a novel all-solid-state ammonium ion selective electrode is prepared by dripping ammonium ion sensing membrane solution on the surface of solid contact layer.The preparation technologies of solid contact layer and sensitive film are optimized to improve the performance of electrode.The test results show that this electrode exhibits Nernst response for ammonium ion with a slope of 59.30 mV·dec-1 over the concentration range of 10-1-10-5 mol·L-1,and the detection limit is as low as 5.0×10-6 mol·L-1.Relative standard deviation of the electrode repeatability is less than 2%.Compared with a commercial electrode,the prepared electrode can eliminate the interference of Na+ and improve the selectivity of K+.When it is used in the actual wastewater detection,the detection results are accurate and the performance of the electrode is stable,indicating a potential application prospect.
刘斯洋, 颜家保, 夏正海, 汪坤, 李静, 胡杰, 赵振悦, 贾彪. 全固态新型铵离子选择性电极的制备及性能[J]. 现代化工, 2020, 40(12): 231-234.
LIU Si-yang, YAN Jia-bao, XIA Zheng-hai, WANG Kun, LI Jing, HU Jie, ZHAO Zhen-yue, JIA biao. Preparation and properties of a novel all-solid-state ammonium ion selective electrode. Modern Chemical Industry, 2020, 40(12): 231-234.
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