Fiber-optic organic vapor sensor

The application of fibre-optic technology to the monitoring of volatile organic compounds in soil groundwater samples is described. Sensors and supporting portable instruments suitable for field applications were developed for continuous in-situ measurements. The sensor's operation depends on f...

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Veröffentlicht in:	Environmental science & technology 1991-07, Vol.25 (7), p.1301-1304
Hauptverfasser:	Barnard, Steven M, Walt, David R
Format:	Artikel
Sprache:	eng
Schlagworte:	02 PETROLEUM 020900 - Petroleum- Environmental Aspects 440800 - Miscellaneous Instrumentation- (1990-) 540220 - Environment, Terrestrial- Chemicals Monitoring & Transport- (1990-) ABSORPTION ALKYLATED AROMATICS Analysis methods Applied sciences AROMATICS BENZENE CONTAMINATION DATA DESIGN EMISSION SPECTRA ENVIRONMENTAL SCIENCES Exact sciences and technology EXPERIMENTAL DATA FIBER OPTICS FIELD TESTS FLUORESCENCE FUELS GASOLINE GROUND WATER HYDROCARBONS HYDROGEN COMPOUNDS INFORMATION LEAKS LIQUID FUELS LUMINESCENCE MATTER MEASURING INSTRUMENTS MEASURING METHODS Natural water pollution NUMERICAL DATA OIL SPILLS ORGANIC COMPOUNDS OTHER INSTRUMENTATION OXYGEN COMPOUNDS PETROLEUM PRODUCTS Pollution POLYMERS PORTABLE EQUIPMENT SOILS SPECTRA STORAGE TEMPERATURE DEPENDENCE TESTING TOLUENE UNDERGROUND STORAGE VOLATILE MATTER WATER Water treatment and pollution XYLENES
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Beschreibung
Zusammenfassung:	The application of fibre-optic technology to the monitoring of volatile organic compounds in soil groundwater samples is described. Sensors and supporting portable instruments suitable for field applications were developed for continuous in-situ measurements. The sensor's operation depends on fluorescence modulation in the presence of volatile organic vapours. Polymer absorption of organic vapours results in a concomitant enhancement of fluorescence in an immobilized fluorophor. In-situ field tests conducted at a jet fuel contamination site showed a detection limit of 10 ppm and a response time of 2.5 minutes with 7.5 per cent signal change.
ISSN:	0013-936X 1520-5851
DOI:	10.1021/es00019a012