Quantification of Ethanol Concentration in Gasoline Using Cuprous Oxide Coated Long Period Fiber Gratings
| Autor: | Filipe Monteiro-Silva, Jose Luis Santos, José M. M. M. de Almeida, Luis Coelho |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Detection limit
Ethanol Materials science 010401 analytical chemistry Analytical chemistry Oxide Optical power 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Thermal conductivity Monitoring ethanol in gasoline coated long period fiber grating chemistry gasoline optical sensor Electrical and Electronic Engineering Gas chromatography–mass spectrometry Gasoline 0210 nano-technology Instrumentation Refractive index bioethanol |
| Zdroj: | Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP |
| ISSN: | 2379-9153 1530-437X |
| Popis: | It is reported a new optical sensing system, based on long period fiber gratings (LPFGs) coated with cuprous oxide (Cu 2 O), for the quantification of ethanol concentration in ethanol-gasoline mixtures. The detection principle is based on the spectral features dependence of the Cu 2 O 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, R 2 =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, respectively. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|