Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

A new agent for derivatizing carbonyl species used to investigate limonene ozonolysis.

Authors
Wells-JR; Ham-JE
Source
Atmos Environ 2014 Dec; 99:519-526
NIOSHTIC No.
20045343
Abstract
A new method for derivatizing carbonyl compounds is presented. The conversion of a series of dicarbonyls to oximes in aqueous solution and from gas-phase sampling was achieved using O-tert-butylhydroxylamine hydrochloride (TBOX). Some advantages of using this derivatization agent include: aqueous reactions, lower molecular weight oximes, and shortened oxime-formation reaction time. Additionally, the TBOX derivatization technique was used to investigate the carbonyl reaction products from limonene ozonolysis. With ozone (O3) as the limiting reagent, four carbonyl compounds were detected: 7-hydroxy-6-oxo-3-(prop-1-en-2-yl)heptanal; 3-Isopropenyl-6-oxoheptanal (IPOH), 3-acetyl-6-oxoheptanal (3A6O) and one carbonyl of unknown structure. Using cyclohexane as a hydroxyl (OH) radical scavenger, the relative yields (peak area) of the unknown carbonyl, IPOH, and 3A6O were reduced indicating the influence secondary OH radicals have on limonene ozonolysis products. The relative yield of the hydroxy-dicarbonyl based on the chromatogram was unchanged suggesting it is only made by the limonene+O3 reaction. The detection of 3A6O using TBOX highlights the advantages of a smaller molecular weight derivatization agent for the detection of multi-carbonyl compounds. The use of TBOX derivatization if combined with other derivatization agents may address a recurring need to simply and accurately detect multi-functional oxygenated species in air.
Keywords
Atmosphere-analyzers; Carbonyls; Analytical-methods; Oximes; Analytical-instruments; Gas-sampling; Aqueous-solutions; Reaction-rates; Reagents; Hydroxyl-groups; Molecular-structure; Weight-factors; Free-radicals; Organic-compounds; Author Keywords: Ozone; Reaction products; Oxygenated organic compounds; Derivatization
Contact
J.R. Wells, Exposure Assessment Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, 1095 Willowdale Road, Morgantown, WV 26505, USA
CODEN
AENVEQ
CAS No.
10028-15-6; 39684-28-1; 138-86-3
Publication Date
20141201
Document Type
Journal Article
Email Address
rwells@cdc.gov
Fiscal Year
2015
NTIS Accession No.
NTIS Price
Identifying No.
M112014
ISSN
1352-2310
NIOSH Division
HELD
Priority Area
Healthcare and Social Assistance; Services
Source Name
Atmospheric Environment
State
WV
TOP