Detection of malathion by the CO2 laser: Potentials and limitations |
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Authors: | Dubravka S Maravi? |
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Institution: | Department of Physical Chemistry, Vin?a Institute of Nuclear Sciences, P.O. Box 522, 11001 Belgrade, Serbia and Montenegro |
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Abstract: | Possibilities of on-line non-contact detection of the vapour of the commercially available pesticide malathion by the CO2 laser were investigated, using a photoacoustic technique developed in our laboratory. A set of laser/vapour spectral coincidences in the usual range of CO2 laser wavelengths were obtained, the samples being: the commercial product Etiol available on the market, solvent, emulsifiers, and neat malathion, all with air added to a mid-pressure of about 100 mbar and to atmospheric pressure. Relative contributions of the components in the product are discussed. A detection limit of 0.002 vol.% of the product in air was estimated. |
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Keywords: | Laser spectroscopy CO2 laser Photoacoustics Pesticides Malathion Etiol Organophosphorous |
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