Pyridine vapors detection by an optical fibre sensor Elosua, César Bariain, Cándido Matias, Ignacio R. Rodríguez Diéguez, Antonio Colacio Rodríguez, Enrique Salinas Castillo, Alfonso Segura Carretero, Antonio Fernández Gutiérrez, Alberto Fibre optic sensor Pyridine vapors sensor Vapochromic cobalt complex Dip coating technique 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). 2014-09-09T09:17:46Z 2014-09-09T09:17:46Z 2008 info:eu-repo/semantics/article Elosua, C.; et al. Pyridine vapors detection by an optical fibre sensor. Sensors, 8(2): 847-859 (2008). [http://hdl.handle.net/10481/32952] 1424-8220 http://hdl.handle.net/10481/32952 10.3390/s8020847 eng info:eu-repo/semantics/openAccess MDPI