ORGANIC-COMPOUNDS IN-CLOUD AND RAIN WATER

Cloud and rain water samples have been collected in spring 1991 in the Vosges mountains (France) and analyzed for aldehydes, phenols and pol ycyclic aromatic hydrocarbons (PAHs). Both passive and active cloud co llectors have been employed. A mean concentration of formaldehyde of 1 97 mug/l (6.6 muM) has been found in cloud water while on the average only 100 mug/l (3.3 muM) were observed in min water. The average pheno l concentration was 3.5 mug/l (37 nM), but only 1.6 mug/l (17 nM) in r ain water. Finally, the mean concentration of PAHs (only determined in cloud water) amounts to 0.37 mug/l. The PAH profile is similar to tha t observed for rain water sampled in Hannover (Germany).