Fiber optic chemical sensor for nitrite based on an electropolymerized cobaltporphyrin film

Seung Tae Yang, Leonidas G. Bachas

Research output: Contribution to journalArticle

18 Scopus citations

Abstract

Fiber optic sensors for nitrite were prepared by first electrochemically depositing a film of cobalt(II) tetrakis(o-aminophenyl)porphyrin, [Co(o-NH2)TPP], on the surface of indium(tin) oxide glass slides. Then, the slides with the immobilized porphyrin were positioned at the tip of an optical fiber bundle. The response of the sensors was based on a change in absorbance caused by the interaction between nitrite and the poly[Co(o-NH2)TPP] film. The sensors had a detection limit of 6 × 10-9M nitrite. The selectivity of the sensors was determined under both separate solutions and fixed interference conditions. The sensor had a long lifetime and was reversible.

Original languageEnglish (US)
Pages (from-to)963-968
Number of pages6
JournalTalanta
Volume41
Issue number6
DOIs
StatePublished - Jun 1994
Externally publishedYes

ASJC Scopus subject areas

  • Analytical Chemistry

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