Journal of the Korean Applied Science and Technology (한국응용과학기술학회지)

The Korean Society of Applied Science and Technology (한국응용과학기술학회)
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Binary Metal Oxide ($IrO_2-RuO_2$) pH Sensor Prepared by Sol-gel Method

Sol-gel 법을 이용한 이성분 금속산화물 ($IrO_2-RuO_2$) pH 센서

  • Received : 2014.03.26
  • Accepted : 2014.06.23
  • Published : 2014.06.30
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Abstract

The sol-gel method was used to prepare binary metal oxide ($IrO_2-RuO_2$) pH sensor. The electrodes that mole percent compositions (mol%) of $IrO_2$ and RuO2 were 70:30 and 30:70 were selected. The characterizations of Nernstian response over pH range, response rate, interference on alkaline metals and reproducibility were investigated. Also the electroanalytical properties of these electrodes were evaluated in comparison with a commercial glass pH electrode. The composition of $IrO_2:RuO_2$ 70:30 mol% was chosen as better electrode formulation. The electrode was not susceptible to the action of interfering ions such as $Li^+$, $Na^+$ and $K^+$.

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