OPTICAL SENSING OF HYDROCARBONS IN AIR OR IN WATER USING UV ABSORPTION IN THE EVANESCENT FIELD OF FIBERS

Authors
SCHWOTZER G LATKA I LEHMANN H WILLSCH R
Citation
G. Schwotzer et al., OPTICAL SENSING OF HYDROCARBONS IN AIR OR IN WATER USING UV ABSORPTION IN THE EVANESCENT FIELD OF FIBERS, Sensors and actuators. B, Chemical, 38(1-3), 1997, pp. 150-153
Citations number
4
Categorie Soggetti
Electrochemistry,"Chemistry Analytical","Instument & Instrumentation
Journal title
Sensors and actuators. B, Chemical → ACNP
ISSN journal
09254005
Volume
38
Issue
1-3
Year of publication
1997
Pages
150 - 153
Database
ISI
SICI code
0925-4005(1997)38:1-3<150:OSOHIA>2.0.ZU;2-E
Abstract
A fiber-optic sensor for the monitoring of organic pollutants in air a nd water is presented. The UV absorption spectra are used for the meas urement of concentration via the evanescent field of silica fibers. Sp ecial hydrophobic polymers which are solvents for hydrocarbons are use d as cladding materials. The fibers coated with the tested siloxanes a nd Teflon show different sensitivities and time response behaviour. Fu rther improvement of the sensitivity is reached through coiling of the fiber.