Preparation and properties of all-solid-state nitrate ion selective electrode
LIAN Bing-bing, YAN Jia-bao, HU Jie, BAO Yan-zhou
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
Abstract: The content of nitrates can often be used to judge the quality of water bodies and the degree of pollution, and it is an important water quality testing index.A novel all-solid-state nitrate ion selective electrode is prepared by using glassy carbon electrode as the base electrode, poly(3, 4-ethylenedioxythiophene) (PEDOT) as solid contact layer, and polyvinyl chloride (PVC) as the sensitive base membrane.The electrochemical characteristics of the electrode are investigated.It is found that using PEDOT as solid contact layer can effectively promote the ion-electron signal conduction between the electrodes and improve the stability of the electrodes.Besides, the electrode exhibits a good Nernst response in ammonium nitrate solution with a concentration in the range of 1×10-1-1×10-5 mol·L-1, the response slope can reach 53.7 mV·dec-1, and the response time is within 50 s.It shows a good reproducibility, a high selectivity, and a service life exceeding 3 months.
连冰冰, 颜家保, 胡杰, 鲍彦舟. 全固态硝酸根离子选择性电极的制备及其性能研究[J]. 现代化工, 2021, 41(10): 135-138.
LIAN Bing-bing, YAN Jia-bao, HU Jie, BAO Yan-zhou. Preparation and properties of all-solid-state nitrate ion selective electrode. Modern Chemical Industry, 2021, 41(10): 135-138.
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