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http://dx.doi.org/10.5012/jkcs.2004.48.3.266

One-component Room Temperature Vulcanizing-Type Silicone Rubber-Based Solid-State Carbonate Ion Selective Electrode  

Kim, Mi-Kyoung (Chemical Sensor Research Group, Department of Chemistry)
Yoon, In-Jun (Chemical Sensor Research Group, Department of Chemistry)
Cho, Sung-Ho (Chemical Sensor Research Group, Department of Chemistry)
Shin, Hye-Ra (Chemical Sensor Research Group, Department of Chemistry)
Han, Jong-Ho (Chemical Sensor Research Group, Department of Chemistry)
Ha, Jeong-Han (Chemical Sensor Research Group, Department of Chemistry)
Nam, Hak-Hyun (Chemical Sensor Research Group, Department of Chemistry)
Cha, Geun-Sig (Chemical Sensor Research Group, Department of Chemistry)
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Abstract
We developed a miniaturized solid-state carbonate ion-selective electrode (carbonate ISE) based on one-component room temperature vulcanizing type silicone rubber 730 (730 RTV) without adding plasticizer to the matrix. The optimized carbonate ion selective membrane is prepared with 85.8 wt% of 730 RTV, 11.1 wt% of trifluoroacetyl-p-decylbenzene (TFADB), and 3.1 wt% of tridodecyl-methylammonium chloride (TDMACl). This carbonate ISE exhibited excellent potentiometric properties (i.e., slope: 26.3 mV/dec; selectivity: $logKT^{pot}_{CO_{2},Cl^-}$= -4.00 and $logKT^{pot}_{TCO_{2},Sal^-}$=1.69); and detection limit for $TCO_2:\;4.0{\times}10^{-4}M$). In addition, the early potentiometric properties of the solid-state sensor with optimized membrane composition were not deteriorated for more than 60 days.
Keywords
Carbonate Ion Selective Membrane; Silicone Rubber; Solid-state Sensor;
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