Atmospheric photochemical reactivity of monoterpene hydrocarbons

Westberg, Hal; Rasmussen, R. A.

doi:10.1016/0045-6535(72)90021-5

Cited by 24 publications

(6 citation statements)

References 7 publications

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“…Emission studies by Zimmerman [1977] indicate that vegetation provides a major source for hydrocarbon input to the atmosphere. Laboratory studies have shown that monoterpenes can actively participate in the photochemical oxidantproducing process [Westberg and Rasmussen, 1972;Gay and Arnts, 1977]. However, the contribution of these natural species to oxidant episodes in ambient atmospheres has not been resolved.…”

Section: Introductionmentioning

confidence: 99%

Analysis of monoterpene hydrocarbons in rural atmospheres

Holdern¹,

Westberg²,

Zimmerman³

1979

J. Geophys. Res.

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Gas chromatographic/mass spectrometric analysis of monoterpenes from a rural forested site in the northwestern United States is described. Use of a glass capillary column provided excellent resolution of the hydrocarbons. Increased sensitivity and specificity of the mass spectrometer detector over the flame ionization detector were demonstrated for trace (parts per trillion) atmospheric hydrocarbons. As little as 10 ppt of compound was detectable in 100-cc air samples. Two analytical methods (cryogenic and solid adsorbent-Tenax-GC) were used in the collection of ambient air. Analytical results from the two techniques compared very well. Rural concentrations of the monoterpenes varied considerably depending upon location within the forest canopy. The concentration of individual species never exceeded I ppb of compound during a 10-month sampling period. The monoterpene total for all samples fell in the range of 0.5-to 16-ppb compound for C•o terpene.

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Section: Introductionmentioning

confidence: 99%

Analysis of monoterpene hydrocarbons in rural atmospheres

Holdern¹,

Westberg²,

Zimmerman³

1979

J. Geophys. Res.

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“…Since it is known that the irradiation of nitrogen dioxide yields atomic oxygen, which reacts with atmospheric oxygen to produce ozone, the results cited above are consistent. Experiments by Westberg and Rasmussen [1972] also examined the reactivity of a number of terpenes with nitrogen oxides and light, leading them to conclude that these olefinic compounds have a short residence time in the atmosphere.…”

Section: P• • Particulatementioning

confidence: 99%

Natural organic atmospheric aerosols of terrestrial origin

Zenchelsky¹,

Youssefi²

1979

Reviews of Geophysics

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Particulate matter in the atmosphere is a major source of contamination, having an impact upon visibility, health, and even climate. These aerosols are predominantly of natural origin. A minor component, the anthropogenic organic aerosol, has been studied extensively because of its relation to smog. Much less is known about the far more abundant natural organic aerosol. Estimates of the annual global production rate of the latter range between 75 and 1000 million metric tons. In contrast, the corresponding rate for man‐made organic aerosol is only between 0.2% and 17% of the natural rate. Thus the natural organic aerosol production rate is exceeded greatly only by that of natural sea‐salt aerosol and possibly by that of natural nitrate. By far the largest proportion of the natural organic aerosol is derived from vegetation by means of a photochemical reaction of its vapors, a process which is observed as haze formation. This reaction of olefins has been studied extensively and is believed to be identical with that involved in smog production by anthropogenic olefins. In fact, the resultant products in the two cases are virtually indistinguishable, although minor differences do exist. An additional possible source for natural organic aerosols is the release of waxy particles from the tips of pine needles by means of electrical brush discharge from clouds. Yet other small amounts come from biological cellular debris and possibly even from volcanos. The role of natural organic aerosols in condensation and precipitation has been studied. Claims for the effectiveness of organic aerosols as ice‐forming nuclei have been made. Natural organic aerosols have been suggested as possible sources of petroleum and of humus in the ground. Biodegradation mechanisms for this result have been considered. If it is verified, the impact upon pollution control strategies would be considerable.

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“…BVOCs play an important role in transforming nitrogen oxides to ozone and their oxidants under the presence of sunlight [2]. Despite awareness of their potent role in photochemical smog formation, it is difficult to accurately assess the extent of their contribution in photochemistry due to the many complexities involved in estimating their source strengths [3].…”

Section: Introductionmentioning

confidence: 99%

Performance test of a sorbent tube sampler with respect to analyte loss in collecting biogenic volatile organic compounds

Ullah

Kim

2014

Anal Bioanal Chem

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The superiority of thermal desorption-gas chromatography (TD-GC) applications is well known for the analysis of biogenic volatile organic compounds (BVOC). Despite the recognition of potential biases associated with sorptive loss reaction, the interaction of reactive BVOC with a sorbent tube (ST) sampler has not been sufficiently investigated. In this study, the extent of such a loss on a sampling device was studied against the sorbent holder materials by comparing stainless steel (SS; main target) and quartz (QZ; reference). To this end, three bed STs (Tenax TA, Carbopack B, and Carbopack X) were prepared using both holding materials (SS vs. QZ). The extent of BVOC loss was then tested for each material against two different phases (liquid and vapor) of ten monoterpenes. Accordingly, the soptive loss on the SS holder ranged from 10 % (vapor) to 20 % (liquid). If a vapor phase BVOC was forced to pass through an empty SS tube, the extent of their loss increased further in a range of 21.1 % (β-P) to 43.5 % (α-T). Likewise, similar loss rates (about 10 % reductions) were also observed when analyzing some environmental samples (pine needle) from the SS holder relative to QZ. Thus, a QZ tube is recommended over a SS tube to avoid sample loss in the collection of BVOC.

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Atmospheric photochemical reactivity of monoterpene hydrocarbons

Cited by 24 publications

References 7 publications

Analysis of monoterpene hydrocarbons in rural atmospheres

Analysis of monoterpene hydrocarbons in rural atmospheres

Natural organic atmospheric aerosols of terrestrial origin

Performance test of a sorbent tube sampler with respect to analyte loss in collecting biogenic volatile organic compounds

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