6533b85afe1ef96bd12b8db9

RESEARCH PRODUCT

Highly Sensitive Detection of Naphthalene in Solvent Vapor Using a Functionalized PBG Refractive Index Sensor

M. RosenbergerMalte BrutschySiegfried R. WaldvogelMaiko GirschikofskyS. BelleRalf Hellmann

subject

AnalyteMaterials sciencegas detection; optical sensor; Bragg grating; cyclodextrin; aromatic hydrocarbonsTransducersaromatic hydrocarbonsAnalytical chemistryPhysics::OpticsNaphthaleneslcsh:Chemical technologyBiochemistryNoise (electronics)gas detectionArticleAnalytical ChemistryFiber Bragg gratinglcsh:TP1-1185Electrical and Electronic Engineeringoptical sensorInstrumentationDetection limitCyclodextrinsEquipment DesignAtomic and Molecular Physics and OpticsEquipment Failure AnalysisRefractometryWavelengthTransducercyclodextrinSolventsBragg gratingGasesRefractometryRefractive index

description

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.

yearjournalcountryeditionlanguage
2012-02-13Sensors
10.3390/s120202018http://www.mdpi.com/1424-8220/12/2/2018/