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Sensors 2008, 8(2), 847-859; doi:10.3390/s8020847

Pyridine Vapors Detection by an Optical Fibre Sensor

1,* , 1
2, 2
3 and 3
Received: 26 December 2007 / Accepted: 4 February 2008 / Published: 8 February 2008
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An optical fibre sensor has been implemented towards pyridine vapors detection;to achieve this, a novel vapochromic material has been used, which, in solid state, suffers achange in colour from blue to pink-white in presence of pyridine vapours. This complex isadded to a solution of PVC (Poly Vinyl Chloride), TBP (Tributylphosphate) andtetrahydrofuran (THF), forming a plasticized matrix; by dip coating technique, the sensingmaterial is fixed onto a cleaved ended optical fibre. The fabrication process was optimizedin terms of number of dips and dipping speed, evaluating the final devices by dynamicrange. Employing a reflection set up, the absorbance spectra and changes in the reflectedoptical power of the sensors were registered to determine their response. A linear relationbetween optical power versus vapor concentration was obtained, with a detection limit of 1ppm (v/v).
Keywords: Fibre optic sensor; Pyridine vapors sensor; Vapochromic cobalt complex; Dip coating technique Fibre optic sensor; Pyridine vapors sensor; Vapochromic cobalt complex; Dip coating technique
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Elosua, C.; Bariain, C.; Matias, I.R.; Rodriguez, A.; Colacio, E.; Salinas-Castillo, A.; Segura-Carretero, A.; Fernandez-Gutiérrez, A. Pyridine Vapors Detection by an Optical Fibre Sensor. Sensors 2008, 8, 847-859.

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