Title of article :
Detection of toluene dissolved in water by using PCS fibers excited by an inclined collimated beam
Author/Authors :
Matejec، نويسنده , , Vlastimil and Chomلt، نويسنده , , Miroslav and Berkova، نويسنده , , Daniela and Mrazek، نويسنده , , Jan and Ardeleanu، نويسنده , , Rodinel and Harabagiu، نويسنده , , Valeria and Pinteala، نويسنده , , Marianna and Simionescu، نويسنده , , Bogdan C، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2003
Abstract :
This paper reports results on the sensitivity of straight polymer-clad silica (PCS) detection fibers with short sensing parts coated with polysiloxane polymers to toluene dissolved in water. The detection was based on refractive index changes of the polymers induced by the penetration of toluene into them. These changes were detected by measuring changes of the output power from the detection fibers excited by an inclined collimated beam at 630 nm.
cially available Cablelite 950-701 and two types of polymethylphenylsiloxane polymers developed at the Romanian Academy were tested as materials for the fabrication of the detection part in the fiber cladding. These parts were prepared by application of polymer layers onto a bare silica core by a dip-coating technique. Layers with thicknesses of about 20 μm were prepared.
es of angular distributions of the output power determined for the detection polymers in contact with air, time response curves measured with the detection parts brought into contact with aqueous solutions of toluene under different hydrodynamic conditions, and sensitivity curves are shown in the paper. The best detection limit of about 10 mg/l of toluene, reversibility and linearity of the fiber response in a range 0–100 mg/l could be achieved with fibers coated with Cablelite 950-701 polymer.
Keywords :
Siloxane coating , Collimated beam excitation , Optical sensing , Toluene in water , Silica fibers
Journal title :
Sensors and Actuators B: Chemical
Journal title :
Sensors and Actuators B: Chemical