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The occurrence of organic peroxides in air at a mountain site
Author(s) -
Fels Michael,
Junkermann Wolfgang
Publication year - 1994
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/93gl01892
Subject(s) - hydrocarbon , organic peroxide , peroxide , hydrogen peroxide , dimethyl sulfide , altitude (triangle) , chemistry , environmental science , environmental chemistry , atmospheric sciences , geology , organic chemistry , sulfur , geometry , mathematics , copolymer , polymer
Mixing ratios of individual organic hydroperoxides were measured during summer 1990 on a mountain summit (1780 m a.s.l.). The dominating compound during the early summer months was hydroxymethyl hydroperoxide (HMHP) while later in the summer methyl hydroperoxide (MHP) prevailed. HMHP and MHP together made up more than 90% of total organic hydroperoxides (ROOH) which constituted about 10–40% of hydrogen peroxide measured concurrently at the same site. The ROOH mixing ratios at an altitude of 1175 m a.s.l., representing the planetary boundary layer (PBL), were about twice as large as those at the summit. Higher ROOH values in the PBL point to ROOH formation from anthropogenic and biogenic hydrocarbon precursors. The tendency to higher HMHP values in early summer points to the possible HMHP formation from biogenically emitted unsaturated hydrocarbon precursors.