Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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A pH Optosensor Based on Fluoresence from Nile Blue Encapsulated within Silica Sol-Gel Film

실리카 졸-겔막을 이용한 pH 광학센서

  • Lee, Jung-Min (Department of Chemistry, College of Natural Sciences, Kyungpook National University) ;
  • Li, Ming (Department of Chemistry, College of Natural Sciences, Kyungpook National University) ;
  • Lee, Sang-Hak (Department of Chemistry, College of Natural Sciences, Kyungpook National University) ;
  • Kim, Young-Sun (Department of Dental Hygiene, Daegu Health College) ;
  • Kim, Chang-Jin (Division of Material Science, College of Natural Sciences, Daegu University) ;
  • Lee, Boo-Huyng (Department of Cosmetology Care, Changwon College)
  • 이정민 (경북대학교 자연과학대학 화학과) ;
  • 이명 (경북대학교 자연과학대학 화학과) ;
  • 이상학 (경북대학교 자연과학대학 화학과) ;
  • 김영선 (대구보건대학교 치위생과) ;
  • 김창진 (대구대학교 자연과학대학 물질과학부) ;
  • 이부형 (창원전문대학 피부미용과)
  • Published : 2004.05.31
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Abstract

A fiber optic pH sensor has been fabricated using nile blue entrapped in an ammonia catalyzed silica sol-gel film coated on glass substrate by dip-coating. The sensor was fixed on the end of an optical fiber. The sensor showed pH sensitivity when dipped into liquids at different pHs. Linear and reproducible responses were obtained in standard buffer solutions in the pH range $6.0{\sim}8.5$, which encompasses the clinically-relevant range. The effects of interferences on the determination of pH were also investigated. The sensors were successfully applied to the determination of pH in different commercial ionic drinks.

Keywords

References

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