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This paper focuses on a few selected applications of laser-based methods to investigate processes of relevance to atmospheric chemistry. A versatile scheme is offered by the laser photofragmentation technique (LPF) which can be used to address non-fluorescent molecules by first photolyzing the species with 193 nm photons and then exciting the fluorescence of the resulting fragments. A special interest is taken in the use of LPF in the study of the oxidation mechanism of dimethyl sulphide (DMS), leading to the formation of sulphuric acid. Another approach also discussed is the possibility of developing an on-line detection scheme of selected elements in size-segregated, ultrafine aerosols.

Additional information

Authors: OMENETTO N, JRC Ispra (IT);PANNE U, Technische Universität München, Institute of Hydrochemistry (DE)
Bibliographic Reference: Paper presented: XXIX Colloquium Spectroscopicum Internationale, Leipzig (DE), August 27 - September 1, 1995
Availability: Available from (1) as Paper EN 39247 ORA
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