Study on All-Solid-State Chloride Sensor Based on Tin Oxide/Indium Tin Oxide Glass

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概要

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• An all-solid-state chloride electrode based on a tin oxide (SnO2)/indium tin oxide (ITO) glass was developed in this study. The sensing membrane of the electrode was prepared by mixing poly(vinyl chloride) (PVC), bis(2-ethylhexyl) sebacate (DOS), {[4,5-dimethy-l-3,6-bis(dodecyloxy)-1,2-phenylene]} bis(mercury chloride) (ETH9033), and tridodecylmethyl ammonium chloride (TDDMACl). The mixed solution was mixed with tetrahydrofuran (THF), and then dropped on the sensing window of SnO2/ITO glass. According to the experimental results, the optimal weight ratio were $\text{PVC}:\text{DOS}:\text{ETH9033}:\text{TDDMACl}=33:66:2:5$. At this optimum weight ratio, the sensitivity was 54 mV/dec while the range of linear concentrations of NaCl solutions was between $10^{-4}$ and 1 M. The lower detection limit of the sensor reached $8\times 10^{-5}$ M and the response time was less than 1 s. The selectivity coefficient was consistent with the theory of Hofmeister lipophilicity. The lifetime was over 60 days and the repeatability was over 50 times. Moreover, the chloride ion sensor was successfully applied to detecting chloride ions in rinsing solutions for contact lenses, and the experimental results revealed that the correlation coefficient was 0.99.

• 2011-03-25

著者

• SUN Tai-Ping

  Institute of Electrical Engineering, National Chi Nan University

• HSIUNG Shen-Kan

  Department of Electronic Engineering, Chung Yuan Christian University

• Chou Jung-chuan

  Department Of Electronic Engineering National Yunlin University Of Science And Technology

• Kao Hui-Ling

  Institute of Electronic Engineering, Chung Yuan Christian University, Chungli, Taiwan 320, R.O.C.

• Cheng Jui-Fu

  Institute of Electronic Engineering, Chung Yuan Christian University, Chungli, Taiwan 320, R.O.C.

• Sun Tai-Ping

  Institute of Electrical Engineering, National Chi Nan University, Nantou, Taiwan 545, R.O.C.

• Chou Jung-Chuan

  Department of Electronic Engineering and Graduate School of Optoelectronics, National Yunlin University of Science and Technology, Douliou, Taiwan 640, R.O.C.

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• Study on All-Solid-State Chloride Sensor Based on Tin Oxide/Indium Tin Oxide Glass
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