Identification and quantification of carbonyl-containing ?-pinene ozonolysis products using O-tert-butylhydroxylamine hydrochloride.

ABSTRACT: The yields of carbonyl-containing reaction products from the ozonolysis of ?-pinene have been investigated using concentrations of ozone found in the indoor environment ([O3] ? 100 ppb). An impinger was used to collect gas-phase oxidation products in water, where the derivatization agent O-tert-butylhydroxylamine hydrochloride (TBOX) and gas chromatography-mass spectrometry were used to identify carbonyl-containing species. Seven carbonyl-containing products were observed. The yield of the primary product, pinonaldehyde was measured to be 76 %. Using cyclohexane as a hydroxyl radical (OH) scavenger, the yield of pinonaldehyde decreased to 46 %, indicating the influence secondary OH radicals have on ?-pinene ozonolysis products. Furthermore, the use of TBOX, a small molecular weight derivatization agent, allowed for the acquisition of the first mass spectral data of oxopinonaldehyde, a tricarbonyl reaction product of ?-pinene ozonolysis. The techniques described herein allow for an effective method for the collection and identification of terpene oxidation products in the indoor environment.

SUBMITTER: Jackson SR 

PROVIDER: S-EPMC5502832 | biostudies-literature | 2017 Sep

REPOSITORIES: biostudies-literature