COLLECTION OF GASEOUS HYDROPEROXIDES WITH A MIST CHAMBER

The new-type forest decline found in Europe and North America has been ascribed to atmospheric oxidants (Ref. 1-3). Organic hydroperoxides a re important oxidants (Ref. 4), and its formations from ozone-natural hydrocarbon reactions were reported. To investigate the formation mech anism as well as to determine atmospheric concentration of hydroperoxi des, a technique for efficient collection is necessary. We tested the applicability of mist chamber developed by Cofer et al. (Ref. 7) to th e collection of gaseous hydroperoxides. The mist chamber was found to have the advantage in following three points : 1) large flow rate, 2) collection efficiency as high as bubbling, and 3) less H2O2 production in the trapping solution during the sampling of ozone-containing air.