title: Formation of organic acids from the gas-phase ozonolysis of terpinolene.
abstract: Gas-phase ozonolysis of terpinolene was studied in static chamber experiments using gas chromatography coupled to mass spectrometric and flame ionisation detection to separate and detect products. Two isomers of C(7)-diacids and three isomers of C(7)-aldehydic acids were identified in the condensed phase after derivatisation. Possible mechanisms of formation of these acids were investigated using different OH radical scavengers and relative humidities, and were compared to those reported earlier for the ozonolysis of beta-pinene. In addition, branching ratios for some of the individual reaction steps, e.g. the branching ratio between the two hydroperoxide channels of the C(7)-CI, were deduced from the quantitative product yield data. Branching ratios for POZ decomposition and the stabilisation/decomposition of the C(7-)CI were also obtained from measurements of the C(7) primary carbonyl product.
authors.affiliation: Department of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing, China 210044.
authors.forename: Yan
authors.initials: Y
authors.lastname: Ma
authors.forename: George
authors.initials: G
authors.lastname: Marston
mesh_terms: D000081005:Cyclohexane Monoterpenes; D016166:Free Radical Scavengers / Q000737:chemistry; D017665:Hydroxyl Radical / Q000737:chemistry; D010126:Ozone / Q000737:chemistry*; D013729:Terpenes / Q000737:chemistry*
chemical_list: D000081005:Cyclohexane Monoterpenes; D016166:Free Radical Scavengers; D013729:Terpenes; D017665:Hydroxyl Radical; D010126:Ozone; C027009:terpinolene