Anion-selective light-addressable potentiometric sensors (LAPS) for the determination of nitrate and sulphate ions

Yu G. Mourzina, Yu E. Ermolenko, T. Yoshinobu, Yu Vlasov, H. Iwasaki, M. J. Schöning

研究成果: Article査読

39 被引用数 (Scopus)

抄録

The technology of fabrication of anion-selective light-addressable potentiometric sensors (LAPS) by using a solid-state microelectronic device integrated with an ion-recognition membrane has been elaborated. The nitrate sensor with ion-exchange membrane exhibits a linear response interval of 3 × 10-5 to 1 × 10-1 mol/l NO3- with an ionic sensitivity of 58 ± 2mV/pNO3. The detection limit was found to be 1 × 10-5 mol/l of nitrate ions and the working pH interval of the sensor is 2.0-11 for 10-2 mol/l NO3-. The sensor has a high selectivity for nitrate over chloride, sulphate, hydrogen phosphate and acetate ions with selectivity coefficients, KNO3/X, of 7 × 10-3, 1 × 10-3, 2 × 10-4 and 5 × 10-3, respectively, and a response time of about 1 min. The SO4-LAPS with polymeric membrane containing neutral sulphate ionophore demonstrates a sensitivity of 26 ± 1 mV/pSO4 in a concentration range of 3 × 10-6 to 1 × 10-2mol/l with a reasonable selectivity over chloride, hydrogen carbonate and hydrogen phosphate ions. Selectivity coefficients, KSO4/X, were found to be 0.6, 0.15 and 0.03, respectively.

本文言語English
ページ(範囲)32-38
ページ数7
ジャーナルSensors and Actuators, B: Chemical
91
1-3
DOI
出版ステータスPublished - 2003 6月 1
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 器械工学
  • 凝縮系物理学
  • 表面、皮膜および薄膜
  • 金属および合金
  • 電子工学および電気工学
  • 材料化学

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