8 ITMP3 / 8éme conférence internationale de photoacoustique et photothermique
J. Phys. IV France 04 (1994) C7-531-C7-534
Comparing the analytical potential of PAS, PDS, TL and PTPS for trace detection of pesticides in waterW. Faubel, T. Schulz, B.S. Seidel, E. Steinle and H.J. Ache
Kernforschungszentrum Karlsruhe GmbH, Institut für Radiochemie, Postfach 3640, 76021 Karlsruhe, Germany
Performances of four related techniques i.e., photoacoustic spectroscopy, photothermal deflection, thermal lensing, and photothermal phase shift spectroscopy have been compared to the conventional beam transmittance spectrophotometry. This concerns to the analytical potential in studies of environmental pollutants. Solutions of pesticides in water are used as specimens in this study. Spectrophotometric, photoacoustic and thermal lensing techniques are also used as detector behind HPLC loaded with a mixture of methanol and water. Thermal lensing and photothermal deflection spectroscopy appear superior in determination of environmental pollutants. The detection limit obtained for pesticides is 0.1µg/Kg.
© EDP Sciences 1994