%0 Journal Article
%T Pyridine Vapors Detection by an Optical Fibre Sensor
%A Cesar Elosua
%A Candido Bariain
%A Ignacio R. Matias
%A Antonio Rodriguez
%J Sensors
%D 2008
%I MDPI AG
%X 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).
%K Fibre optic sensor
%K Pyridine vapors sensor
%K Vapochromic cobalt complex
%K Dip coating technique
%U http://www.mdpi.com/1424-8220/8/2/847/