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dc.contributor.authorSilva, Filipe Monteiropt_PT
dc.contributor.authorSantos, José Luíspt_PT
dc.contributor.authorAlmeida, José Manuel Marques Martins Dept_PT
dc.contributor.authorCoelho, Luispt_PT
dc.identifier.citationFilipe Monteiro-Silva; Santos, José Luís; de Almeida, Jose Manuel Marques Martins; Coelho, Luis. Quantification of Ethanol Concentration in Gasoline Using Cuprous Oxide Coated Long Period Fiber Gratings, IEEE Sensors Journal, 18, 4, 1493-1500, 2018.pt_PT
dc.description.abstractIt is reported a new optical sensing system, based on long period fiber gratings (LPFGs) coated with cuprous oxide (Cu2O), for the quantification of ethanol concentration in ethanol-gasoline mixtures. The detection principle is based on the spectral features dependence of the Cu2O coated LPFGs on the refractive index of the surrounding medium. The chemical constitution of the ethanol-gasoline samples was obtained by gas chromatography mass spectrometry (GC) and GC thermal conductivity detection. Two different modes of operation are presented, wavelength shift and optical power shift mode of operation, with good linear relations between ethanol concentration and the corresponding spectral features of the LPFGs, R2 = 0.999 and 0.996, respectively. In the range of ethanol concentration up to 30% v/v, the sensitivities were 0.76 ± 0.01 nm/% v/v and 0.125 ± 0.003 dB/% v/v with resolutions of 0.21% v/v and 0.73% v/v and limits of detection of 1.63% v/v and 2.10% v/v, for the for the same operation modes, respectivelypt_PT
dc.subjectMonitoring ethanol in gasolinept_PT
dc.subjectgasoline optical sensorpt_PT
dc.subjectcoated long period fiber gratingpt_PT
dc.titleQuantification of ethanol concentration in gasoline using cuprous oxide coated long period fiber gratingspt_PT
degois.publication.titleIEEE SENSORS JOURNALpt_PT
Appears in Collections:DFIS - Artigo publicado em Revista Científica Indexada

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