An agar-based silver|silver chloride reference electrode for use in micro-electrochemistry |
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| Institution: | 1. School of Chemical and Biological Engineering, College of Engineering, Institute of Chemical Process, Seoul National University (SNU), 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea;2. Department of Environmental Engineering and Institute of Energy/Environment Convergence Technologies, Kongju National University, 1223-23, Cheonan-daero, Cheonan-si 31080, Republic of Korea;3. Department of Biological and Chemical Engineering, College of Science and Technology, Hongik University, Sejong-si 30016, Republic of Korea;4. Wetsus, European Centre of Excellence for Sustainable Water Technology, Oostergoweg 9, 8911 MA Leeuwarden, the Netherlands |
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| Abstract: | A miniaturised Ag|AgCl reference electrode is described which can be easily set up. Its electrochemical behaviour was proven by micro-polarisation curves, electrochemical impedance spectroscopy and potential transients. A saturated potassium chloride solution was used which was solidified by adding agar. The electrode is as small as 800 μm in diameter and 5 mm in length, with further potential for down-sizing. A modified version includes an agar salt bridge in the same capillary. After an induction period of 6 h the potential becomes stable within 1 mV for more than 6 weeks. The electrode shows a slightly different reference potential, which is discussed in terms of the production process. |
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