A novel fast gas chromatography method for higher time resolution measurements of speciated monoterpenes in air
Biogenic emissions supply the largest fraction of non-methane volatile organic compounds (VOC) from the biosphere to the atmospheric boundary layer, and typically comprise a complex mixture of reactive terpenes. Due to this chemical complexity, achieving comprehensive measurements of biogenic VOC (B...
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doaj-5199147f35cb4677a406039bde83be4d2020-11-24T23:50:19ZengCopernicus PublicationsAtmospheric Measurement Techniques1867-13811867-85482014-05-01751259127510.5194/amt-7-1259-2014A novel fast gas chromatography method for higher time resolution measurements of speciated monoterpenes in airC. E. Jones0S. Kato1Y. Nakashima2Y. Kajii3Graduate School of Global Environmental Studies, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto, 606-8501, JapanDepartment of Applied Chemistry, Faculty of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo, 192–0397, JapanDepartment of Environmental and Natural Resource Science, Faculty of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo, 183-8538, JapanGraduate School of Global Environmental Studies, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto, 606-8501, JapanBiogenic emissions supply the largest fraction of non-methane volatile organic compounds (VOC) from the biosphere to the atmospheric boundary layer, and typically comprise a complex mixture of reactive terpenes. Due to this chemical complexity, achieving comprehensive measurements of biogenic VOC (BVOC) in air within a satisfactory time resolution is analytically challenging. To address this, we have developed a novel, fully automated Fast Gas Chromatography (Fast-GC) based technique to provide higher time resolution monitoring of monoterpenes (and selected other C<sub>9</sub>-C<sub>15</sub> terpenes) during plant emission studies and in ambient air. To our knowledge, this is the first study to apply a Fast-GC based separation technique to achieve quantification of terpenes in ambient air. Three chromatography methods have been developed for atmospheric terpene analysis under different sampling scenarios. Each method facilitates chromatographic separation of selected BVOC within a significantly reduced analysis time compared to conventional GC methods, whilst maintaining the ability to quantify individual monoterpene structural isomers. Using this approach, the C<sub>9</sub>-C<sub>15</sub> BVOC composition of single plant emissions may be characterised within a 14.5 min analysis time. Moreover, in-situ quantification of 12 monoterpenes in unpolluted ambient air may be achieved within an 11.7 min chromatographic separation time (increasing to 19.7 min when simultaneous quantification of multiple oxygenated C<sub>9</sub>-C<sub>10</sub> terpenoids is required, and/or when concentrations of anthropogenic VOC are significant). These analysis times potentially allow for a twofold to fivefold increase in measurement frequency compared to conventional GC methods. Here we outline the technical details and analytical capability of this chromatographic approach, and present the first in-situ Fast-GC observations of 6 monoterpenes and the oxygenated BVOC (OBVOC) linalool in ambient air. During this field deployment within a suburban forest ~30 km west of central Tokyo, Japan, the Fast-GC limit of detection with respect to monoterpenes was 4–5 ppt, and the agreement between Fast-GC and PTR-MS derived total monoterpene mixing ratios was consistent with previous GC/PTR-MS comparisons. The measurement uncertainties associated with the Fast-GC quantification of monoterpenes are ≤ 12%, while larger uncertainties (up to ~25%) are associated with the OBVOC and sesquiterpene measurements.http://www.atmos-meas-tech.net/7/1259/2014/amt-7-1259-2014.pdf |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
C. E. Jones S. Kato Y. Nakashima Y. Kajii |
spellingShingle |
C. E. Jones S. Kato Y. Nakashima Y. Kajii A novel fast gas chromatography method for higher time resolution measurements of speciated monoterpenes in air Atmospheric Measurement Techniques |
author_facet |
C. E. Jones S. Kato Y. Nakashima Y. Kajii |
author_sort |
C. E. Jones |
title |
A novel fast gas chromatography method for higher time resolution measurements of speciated monoterpenes in air |
title_short |
A novel fast gas chromatography method for higher time resolution measurements of speciated monoterpenes in air |
title_full |
A novel fast gas chromatography method for higher time resolution measurements of speciated monoterpenes in air |
title_fullStr |
A novel fast gas chromatography method for higher time resolution measurements of speciated monoterpenes in air |
title_full_unstemmed |
A novel fast gas chromatography method for higher time resolution measurements of speciated monoterpenes in air |
title_sort |
novel fast gas chromatography method for higher time resolution measurements of speciated monoterpenes in air |
publisher |
Copernicus Publications |
series |
Atmospheric Measurement Techniques |
issn |
1867-1381 1867-8548 |
publishDate |
2014-05-01 |
description |
Biogenic emissions supply the largest fraction of non-methane volatile
organic compounds (VOC) from the biosphere to the atmospheric boundary
layer, and typically comprise a complex mixture of reactive terpenes. Due to
this chemical complexity, achieving comprehensive measurements of biogenic
VOC (BVOC) in air within a satisfactory time resolution is analytically
challenging. To address this, we have developed a novel, fully automated
Fast Gas Chromatography (Fast-GC) based technique to provide higher time
resolution monitoring of monoterpenes (and selected other C<sub>9</sub>-C<sub>15</sub>
terpenes) during plant emission studies and in ambient air. To our
knowledge, this is the first study to apply a Fast-GC based separation
technique to achieve quantification of terpenes in ambient air. Three
chromatography methods have been developed for atmospheric terpene analysis
under different sampling scenarios. Each method facilitates chromatographic
separation of selected BVOC within a significantly reduced analysis time
compared to conventional GC methods, whilst maintaining the ability to
quantify individual monoterpene structural isomers. Using this approach, the
C<sub>9</sub>-C<sub>15</sub> BVOC composition of single plant emissions may be
characterised within a 14.5 min analysis time. Moreover, in-situ
quantification of 12 monoterpenes in unpolluted ambient air may be achieved
within an 11.7 min chromatographic separation time (increasing to 19.7 min
when simultaneous quantification of multiple oxygenated C<sub>9</sub>-C<sub>10</sub>
terpenoids is required, and/or when concentrations of anthropogenic VOC are
significant). These analysis times potentially allow for a twofold to fivefold
increase in measurement frequency compared to conventional GC methods. Here we outline the technical
details and analytical capability of this chromatographic approach, and
present the first in-situ Fast-GC observations of 6 monoterpenes and the
oxygenated BVOC (OBVOC) linalool in ambient air. During this field
deployment within a suburban forest ~30 km west of central
Tokyo, Japan, the Fast-GC limit of detection with respect to monoterpenes
was 4–5 ppt, and the agreement between Fast-GC and PTR-MS derived total
monoterpene mixing ratios was consistent with previous GC/PTR-MS
comparisons. The measurement uncertainties associated with the Fast-GC
quantification of monoterpenes are ≤ 12%, while larger uncertainties
(up to ~25%) are associated with the OBVOC and
sesquiterpene measurements. |
url |
http://www.atmos-meas-tech.net/7/1259/2014/amt-7-1259-2014.pdf |
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