Behavioral experimental studies of a novel vapochromic material towards development of optical fiber organic compounds sensor

Bariain, Cándido; Matı́as, Ignacio R.; Romeo, Inocencio; Garrido, Julián; Laguna, Mariano

doi:10.1016/s0925-4005(01)00563-9

Cited by 34 publications

(22 citation statements)

References 20 publications

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“…The choice of a wavelength of 1550 nm has been based on an observed increase in the reflected optical power of approximately 2 dB when increasing the wavelengths from 1310 to 1550 nm during toluene detection. These results are in a good agreement with a study of Bariáin et al, 5 regarding the response of an optical-fiber sensor for the measurements of organic compounds at three different working wavelengths.…”

Section: Methodssupporting

confidence: 92%

“…Lately, several research groups [5][6][7][8][9][10][11][12][13] focused their attention on optical fiber sensors as a tool for monitoring the concentration of VOCs. Bruckner and Synovec 14 have developed an annular column chromatographic optical-fiber sensor for the separation and detection of methane, benzene, butanone and chlorobenzene in 6 min.…”

Section: Introductionmentioning

confidence: 99%

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Gas Chromatography-Optical Fiber Detector for the Speciation of Aromatic Hydrocarbons in Confined Areas

2008

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An analytical method, based on separation with gas chromatography (GC) and detection with optical fiber (OF), was used for the separation, detection and quantification of benzene, toluene, ethylbenzene, p-xylene, m-xylene and o-xylene. The use of OF as a detector is based on the variations of the reflected optical power detected when the aromatic compounds eluted from the GC column are sorbed in a thin polymeric film on a single-mode OF. General figures of merit, such as the analytical time, analytical error and analytical performance of GC-OF were similar to those of the classical analytical methods, such as a gas chromatography-flame ionization detector (GC-FID). However, the developed GC-OF method constitutes a much less expensive alternative for the speciation of aromatic hydrocarbons compounds, with high accuracy, and being most suitable for actual monitoring work on confined environments.

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Section: Methodssupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Gas Chromatography-Optical Fiber Detector for the Speciation of Aromatic Hydrocarbons in Confined Areas

2008

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“…There is a family of complexes of general formula [AuAg(C 6 F 5 ) 2 L] n , where L is a ligand molecule that can be pyridine, 2,2'bipridine, 1,10 phenantroline, ½ diphenylacetylene and other ligands [10,11], which change from different colour as orange or red to white in the presence of coordinating solvent as acetone, methanol or ethanol. In these cases, the polynuclear structure of starting compound [Au 2 Ag 2 (C 6 F 5 ) 4 (C 6 H 5 N) 2 ] disappears and a new anion-cation derivate is formed as a consequence of the solvent coordination to the silver centre, creaking both the gold-silver bounds and the gold-gold contacts, which are responsible of the initial colour.…”

Section: Iivapocromic Materialsmentioning

confidence: 99%

Detection of Volatile Organic Compounds Based on Optical Fibre using Nanostructured Films

Elosúa

Matı́as

Bariain

et al. 2008

International Journal on Smart Sensing and Intelligent Systems

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Abstract-An optical fibre sensor for detection of volatile organic compounds (VOCs) has been implemented. This device is based on a vapochromic material presented in the form of bright red powders, which suffers reversible changes in its optical properties when exposed to some organic vapours. The sensor head consists of a nano interferometer doped with the vapochromic material, built onto a cleaved ended multimode optical fibre by using the Layer by Layer Electrostatic Self Assembly Method (LbL). A reflection scheme was used, so the intensity modulated reflected signal is registered in order to study its response. Changes up to 3 dB in the reflected optical power were measured.

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“…Furthermore, optical fibre sensors can be used for fast and safe detection in environments with high inflammability risk and inaccessible areas, such as in high temperature or radiation environments. In recent years, many optical fibre sensors for organic vapours detection have been reported based on optical fibre technology (Zimmermann et al, 1997;Kondratowicz et al, 2001;Abdelmalek et al,1999;Abdelghani et al, 1997a;Abdelghani et al, 2001;Abdelghani et al, 1997b;Horrillo et al, 2004;Bariáin et al, 2001;Bariáin et al, 2003;Bariáin et al, 2005;Elosúa et al, 2006). Optical fibre sensors based on polymer-cladding are a very promising tool concerning VOCs detection, due to its simplicity and sensitivity.…”

Section: Introductionmentioning

confidence: 99%

Sensing of volatile organic compounds in indoor atmosphere and confined areas of industrial environments

Silva

Rocha-Santos²,

Duarte³

2013

Global NEST Journal

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A chemical vapour sensor working with a monochromatic light source and based on optical fibre coated with a thin siloxane polymer film has been developed for in situ monitoring of volatile organic compounds, such as ethylbenzene, xylene (o-xylene), heptane, octane, chloroform, carbon tetrachloride, ethanol and butanol in indoor atmosphere and confined areas of industrial environments. The sensor consists on a monomode optical fibre with an end surface coated with a thin polymeric film by dip-coating technique. The light source utilized was a stabilized laser diode at 1550 nm and the light power changes were measured with a photodiode. The sensor was tested for different VOCs and for different individual concentrations regarding stability, sensitivity, repeatability and reversibility of the analytical signal. The response and desorption time have been found to be 30 seconds and good reproducibility and accuracy have been also obtained. Finally, the analytical performance of the developed sensor was also evaluated and found adequate for actual monitoring on indoor atmospheres.

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Behavioral experimental studies of a novel vapochromic material towards development of optical fiber organic compounds sensor

Cited by 34 publications

References 20 publications

Gas Chromatography-Optical Fiber Detector for the Speciation of Aromatic Hydrocarbons in Confined Areas

Gas Chromatography-Optical Fiber Detector for the Speciation of Aromatic Hydrocarbons in Confined Areas

Detection of Volatile Organic Compounds Based on Optical Fibre using Nanostructured Films

Sensing of volatile organic compounds in indoor atmosphere and confined areas of industrial environments

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