title: Highly sensitive detection of naphthalene in solvent vapor using a functionalized PBG refractive index sensor.
abstract: We report an optical refractive index sensor system based on a planar Bragg grating which is functionalized by substituted γ-cyclodextrin to determine low concentrations of naphthalene in solvent vapor. The sensor system exhibits a quasi-instantaneous shift of the Bragg wavelength and is therefore capable for online detection. The overall shift of the Bragg wavelength reveals a linear relationship to the analyte concentration with a gradient of 12.5 ± 1.5 pm/ppm. Due to the spectral resolution and repeatability of the interrogation system, this corresponds to acquisition steps of 80 ppb. Taking into account the experimentally detected signal noise a minimum detection limit of 0.48 ± 0.05 ppm is deduced.
authors.affiliation: University of Applied Sciences Aschaffenburg, Würzburger Strasse 45, D-63743 Aschaffenburg, Germany. maiko.girschikofsky@h-ab.de
authors.forename: Maiko
authors.initials: M
authors.lastname: Girschikofsky
authors.forename: Manuel
authors.initials: M
authors.lastname: Rosenberger
authors.forename: Stefan
authors.initials: S
authors.lastname: Belle
authors.forename: Malte
authors.initials: M
authors.lastname: Brutschy
authors.forename: Siegfried R
authors.initials: SR
authors.lastname: Waldvogel
authors.forename: Ralf
authors.initials: R
authors.lastname: Hellmann
mesh_terms: D003505:Cyclodextrins / Q000737:chemistry*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005740:Gases / Q000032:analysis / Q000737:chemistry; D009281:Naphthalenes / Q000032:analysis*; D012031:Refractometry / Q000295:instrumentation*; D012997:Solvents / Q000032:analysis / Q000737:chemistry; D014159:Transducers
chemical_list: D003505:Cyclodextrins; D005740:Gases; D009281:Naphthalenes; D012997:Solvents; C031721:naphthalene