n - Fachhochschule Jena
n - Fachhochschule Jena
n - Fachhochschule Jena
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Transmissivity<br />
UV Fiber Evanescent Field<br />
Absorption Spectroscopy (EFAS) Sensors<br />
In-situ monitoring of organic pollution (BTEX, PAK) in water, soil or in<br />
atmosphere using sensitive (permeable) optical polymer fiber cladding<br />
1,0<br />
0,8<br />
0,6<br />
0,4<br />
0,2<br />
Xylene<br />
Toluene<br />
Benzene<br />
Petrol<br />
Naphta<br />
250 300 350 400 450<br />
Wavelength [nm]<br />
Claddin<br />
Analyte g<br />
(air,<br />
water)<br />
BTEX (Benzene, Toluene, Ethylbenzene, Xylene)<br />
spectra in water<br />
BTEX detection limits in air<br />
Substance<br />
Detection limit<br />
(ml/m 3 )<br />
Max. allowed<br />
concentration<br />
Benzene 3 1<br />
Toluene 10 50<br />
Xylene 10 100<br />
FOS - 33
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