Fluorimetric detection of water pollutants with a fiber-coupled solid state UV laser

Peter Karlitschek; Uwe Buenting; T. Northemann; Georg Hillrichs

doi:10.1117/12.257364

8 November 1996 Fluorimetric detection of water pollutants with a fiber-coupled solid state UV laser

Peter Karlitschek, Uwe Buenting, T. Northemann, Georg Hillrichs

Proceedings Volume 2965, ALT '96 International Symposium on Laser Methods for Biomedical Applications; (1996) https://doi.org/10.1117/12.257364
Event: ALT '96 International Symposium: Laser Methods for Biomedical Applications, 1996, Heraklion, Crete, Greece

Abstract

Aromatic hydrocarbons are important and dangerous pollutants of the aquatic environment. With the method of laser-induced fluorescence it is possible to detect Benzene, Toluene, Xylene (BTX) as well as Polycyclic Aromatic Hydrocarbons (PAH) sensitively. The detection of these molecules by a continuously working in-situ method is achieved by combining LIF with fiberoptic guidance of light. We presence results on the detection of BTX and PAH by excitation with 266 nm and 355 nm radiation from a diode-pumped solid-state laser especially developed for sensor applications. The system is operated with thermoelectric cooling and battery supply independent of any installations is projected. The laser delivers pulses of 7 ns/140 (mu) J in the UV at a repetition rate of 100 Hz. Using time-resolved and spectrally-resolved detection of the fluorescence signal, the system delivers information that can be used to discriminate between BTX and PAH-molecules. We have also performed extensive investigations of the influence of scattering particles on the sensor signal. This led to specific optimizations of the sensor-head for different applications.

Citation Download Citation

Peter Karlitschek, Uwe Buenting, T. Northemann, and Georg Hillrichs "Fluorimetric detection of water pollutants with a fiber-coupled solid state UV laser", Proc. SPIE 2965, ALT '96 International Symposium on Laser Methods for Biomedical Applications, (8 November 1996); https://doi.org/10.1117/12.257364

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available