A chamber study of alkyl nitrate production formed by terpene ozonolysis in the presence of NO and alkanes

Organic nitrates are relatively long-lived species and have been shown to have a potential impact on atmospheric chemistry on local, regional, and even global scales. However, the significance of these compounds in the indoor environment remains to be seen. This work describes an impinger-based samp...

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Bibliographic Details
Published in:Atmospheric environment (1994) Vol. 171; pp. 143 - 148
Main Authors: Jackson, Stephen R., Harrison, Joel C., Ham, Jason E., Wells, J.R.
Format: Journal Article
Language:English
Published: England Elsevier Ltd 01.12.2017
Subjects:
air
alkanes
alpha-pinene
atmospheric chemistry
gas chromatography
Indoor air
nitrates
nitric oxide
Occupational health
Organic nitrate
ozone
ozonolysis
polytetrafluoroethylene
Sampling
Terpene
Occupational health
Terpene
Sampling
Organic nitrate
Indoor air
ISSN:1352-2310, 1873-2844
Online Access:Get full text
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Summary:Organic nitrates are relatively long-lived species and have been shown to have a potential impact on atmospheric chemistry on local, regional, and even global scales. However, the significance of these compounds in the indoor environment remains to be seen. This work describes an impinger-based sampling and analysis technique for organic nitrate species, focusing on formation via terpene ozonolysis in the presence of nitric oxide (NO). Experiments were conducted in a Teflon film environmental chamber to measure the formation of alkyl nitrates produced from α-pinene ozonolysis in the presence of NO and alkanes using gas chromatography with an electron capture detector. For the different concentrations of NO and O3 analyzed, the concentration ratio of [O3]/[NO] around 1 was found to produce the highest organic nitrate concentration, with [O3] = 100 ppb & [NO] = 105 ppb resulting in the most organic nitrate formation, roughly 5 ppb. The experiments on α-pinene ozonolysis in the presence of NO suggest that organic nitrates have the potential to form in indoor air between infiltrated ozone/NO and terpenes from household and consumer products. •Description of ethyl acetate as an impinger medium for collection of gas-phase organic nitrates.•Quantified alkyl nitrate formation initiated by terpene ozonolysis for a range of ozone and NO concentrations.•Ozone and NO concentrations near 100 ppb resulted in the highest organic nitrate yield observed, roughly 5 ppb.
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ISSN:1352-2310
1873-2844
DOI:10.1016/j.atmosenv.2017.10.002