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Pyridine Vapors Detection by an Optical Fibre Sensor
Department of Electric and Electronic Engineering, Universidad Pública de Navarra, Campus Arrosadía s/n, E-31006 Pamplona, Spain
Department of Inorganic Chemistry, Universidad de Granada, Campus Fuentenueva s/n, E-18071 Granada, Spain
Department of Analytical Chemistry, Universidad de Granada, Campus Fuentenueva s/n, E-18071 Granada, Spain
* Author to whom correspondence should be addressed.
Received: 26 December 2007; Accepted: 4 February 2008 / Published: 8 February 2008
Abstract: 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
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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.
Elosua C, Bariain C, Matias IR, Rodriguez A, Colacio E, Salinas-Castillo A, Segura-Carretero A, Fernandez-Gutiérrez A. Pyridine Vapors Detection by an Optical Fibre Sensor. Sensors. 2008; 8(2):847-859.
Elosua, Cesar; Bariain, Candido; Matias, Ignacio R.; Rodriguez, Antonio; Colacio, Enriquie; Salinas-Castillo, Alfonso; Segura-Carretero, Antonio; Fernandez-Gutiérrez, Alberto. 2008. "Pyridine Vapors Detection by an Optical Fibre Sensor." Sensors 8, no. 2: 847-859.