title: Pyridine Vapors Detection by an Optical Fibre Sensor.
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).
authors.affiliation: Department of Electric and Electronic Engineering, Universidad Pública de Navarra, Campus Arrosadía s/n, E-31006 Pamplona, Spain. cesar.elosua@unavarra.es.
authors.forename: Cesar
authors.initials: C
authors.lastname: Elosua
authors.affiliation: Department of Electric and Electronic Engineering, Universidad Pública de Navarra, Campus Arrosadía s/n, E-31006 Pamplona, Spain. cba@unavarra.es.
authors.forename: Candido
authors.initials: C
authors.lastname: Bariain
authors.affiliation: Department of Electric and Electronic Engineering, Universidad Pública de Navarra, Campus Arrosadía s/n, E-31006 Pamplona, Spain. natxo@unavarra.es.
authors.forename: Ignacio R
authors.initials: IR
authors.lastname: Matias
authors.affiliation: Department of Inorganic Chemistry, Universidad de Granada, Campus Fuentenueva s/n, E-18071 Granada, Spain.
authors.forename: Antonio
authors.initials: A
authors.lastname: Rodriguez
authors.affiliation: Department of Inorganic Chemistry, Universidad de Granada, Campus Fuentenueva s/n, E-18071 Granada, Spain. ecolacio@ugr.es.
authors.forename: Enriquie
authors.initials: E
authors.lastname: Colacio
authors.affiliation: Department of Analytical Chemistry, Universidad de Granada, Campus Fuentenueva s/n, E-18071 Granada, Spain. alfonsosalinas@yahoo.es.
authors.forename: Alfonso
authors.initials: A
authors.lastname: Salinas-Castillo
authors.affiliation: Department of Analytical Chemistry, Universidad de Granada, Campus Fuentenueva s/n, E-18071 Granada, Spain.
authors.forename: Antonio
authors.initials: A
authors.lastname: Segura-Carretero
authors.affiliation: Department of Analytical Chemistry, Universidad de Granada, Campus Fuentenueva s/n, E-18071 Granada, Spain. albertof@ugr.es.
authors.forename: Alberto
authors.initials: A
authors.lastname: Fernandez-Gutiérrez
keywords: Dip coating technique; Fibre optic sensor; Pyridine vapors sensor; Vapochromic cobalt complex