ENHANCING THE SENSITIVITY OF CHEMICAL SENSORS FOR CHLORINATED HYDROCARBONS IN WATER BY THE USE OF TAPERED SILVER-HALIDE FIBERS AND TUNABLE DIODE-LASERS

Authors
GOBEL R KRSKA R KELLNER R KASTNER J LAMBRECHT A TACKE M KATZIR A
Citation
R. Gobel et al., ENHANCING THE SENSITIVITY OF CHEMICAL SENSORS FOR CHLORINATED HYDROCARBONS IN WATER BY THE USE OF TAPERED SILVER-HALIDE FIBERS AND TUNABLE DIODE-LASERS, Applied spectroscopy, 49(8), 1995, pp. 1174-1177
Citations number
21
Categorie Soggetti
Instument & Instrumentation",Spectroscopy
Journal title
Applied spectroscopy → ACNP
ISSN journal
00037028
Volume
49
Issue
8
Year of publication
1995
Pages
1174 - 1177
Database
ISI
SICI code
0003-7028(1995)49:8<1174:ETSOCS>2.0.ZU;2-9
Abstract
Tapered silver halide fibers were used for the first time for high-sen sitivity fiber evanescent wave spectroscopic (FEWS) measurements of ch lorinated hydrocarbons (CHCs) in water at trace level. The sensor arra ngement consisted of a tunable diode laser (TDL) source, a polymer-coa ted and tapered silver halide fiber, and a direct fiber/mercury cadmiu m telluride (MCT) detector coupling. A minimum detection limit of 50 m u g L(-1) was achieved by using a polyisobutylene-coated fiber with a 1:4 tapering ratio. The sensor response is in the minute range and sho ws reversible analyte enrichment.