섬유

optical ph sensor based on the chemical modification of a porous polymer film

  • 출판일1999.03
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 295
a new approach to the design and construction of an optical ph sensor has been developed by immobilizing a direct azo dye at a porous cellulosic polymer film. the sensor was fabricated by binding congo red to a cellulose acetate film that had previously been subjected to an exhaustive base hydrolysis. advantageous features of the design include (1) a rapid equilibration time ( $less than$ 1. 3 s), (2) a large dynamic range ( $greater than$ 4 ph units), and (3) ease of fabrication. the rapid response results from the porous structure of the polymeric support, which minimizes barriers to mass transport. (edited author abstract) 28 refs
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