科研之友
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摘要
Carbon paste electrodes modified by various dihydroxyquinone derivatives are investigated using both cyclic voltammetry and square wave voltammetry in order to ascertain suitability as voltammetric pH sensors. These electrodes show a Nernstian response to the change of pH, with a potential shift close to the theoretical value, 59.2 mV per pH unit at 298 K. Moreover, their capability of measuring the pH of the unbuffered solution with less than 5% error can be attributed to the occurrence of both inter- and intramolecular hydrogen bonding present within the system. The efficacy of the compounds to be used as materials for solid state pH sensors is discussed.
- 出版日期2016-2-1
