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| Evaluation of a New Sb/Sb2O3 pH Electrode Prepared by Isostatic Compaction |
| Received:June 09, 2015 Revised:December 15, 2015 |
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| DOI：10.7643/issn.1672-9242.2015.06.018 |
| KeyWord:Sb/Sb2O3 pH electrode isostatic compaction |
| Author | Institution |
| CUI Zhen-bang |
Ocean University of China，Qingdao ，China |
| DU Min |
Ocean University of China，Qingdao ，China |
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| Abstract: |
| Objective To study the preparation of micro Sb/Sb2O3 solid-state pH electrode to overcome the defect of glass electrode. Methods The Sb/Sb2O3 pH electrode was fabricated by isostatic compaction. Distribution and characterization of surface composition were evaluated by scanning electron microscope and X ray diffraction. The performances of the electrode were evaluated by potentiometric method, cyclic voltammetry and current interrupt technique. Results The effective components of the electrode were evenly distributed on the surface of the electrode. The activation time of the Sb/Sb2O3 pH electrode was less than 200 s. The Sb/Sb2O3 pH electrode had a responsive slope of -32.87 mV/pH in the working range from pH 1.0 to pH 5.0. This electrode showed excellent anti ion interference and superb reversibility. The cyclic voltammetry results confirmed the reaction occurred on the surface of this electrode. The measurement error between Sb/Sb2O3 pH electrode and glass electrode was about 0.05 when measuring pH values of solutions. This electrode met the measurement requirements. Conclusion The Sb/Sb2O3 pH electrode was fabricated successfully by isostatic compaction. |
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