Canister-Based Method for Monitoring Toxic VOCs in Ambient Air

McGlenny, William A.; Pleil, Joachim D.; Evans, G. J.; Oliver, Karen D.; Holdren, Michael W.; Winberry, William T.

doi:10.1080/10473289.1991.10466924

Cited by 75 publications

(18 citation statements)

References 15 publications

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“…During the pre-concentration step of VOCs on a solid sorbent, unsaturated BVOCs may react with ambient ozone, leading to their loss and the formation of more oxygenated compounds (Lee et al, 2006;McGlenny et al, 1991). These unwanted reactions can be reduced if ozone is selectively removed from the sampled flow before the pre-concentration stage.…”

Section: Ozone Removalmentioning

confidence: 99%

Optimization of a gas chromatographic unit for measuring BVOCs in ambient air

Mermet

Sauvage

Dusanter

et al. 2019

Preprint

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A new online gas chromatographic method dedicated to Biogenic Volatile Organic Compounds (BVOC) analysis was developed for the measurement of a 20 BVOC gaseous mixture (-terpinene and 2-carene) at a time resolution of 90 minutes. The optimized method includes an online Peltier-cooled thermodesorption system sample trap made of Carbopack B coupled to a gas 15 chromatographic system equipped with a 60 m, 0.25 mm i.d. BPX5 column. Eluent was analysed using a flame ionization detection (FID). Potassium iodide was identified as the best ozone scrubber for the 20 BVOC mixture. In order to obtain an accurate quantification of BVOC concentrations, the development of a reliable standard mixture was also required.Quantification of BVOCs was reported with a detection limit ranging from 4 ppt for α-pinene to 19 ppt for sabinene. The main source of uncertainty was the calibration step, stressing the need of certified gaseous standards for a wider panel of 20BVOCs. This new method was applied for the first time to measure BVOCs in a pine forest during the LANDEX-episode-1 field campaign (summer 2017). All targeted BVOCs were detected at least once along the campaign. The two major monoterpenes observed were β-pinene and α-pinene, representing on average 60% of the measured terpenoïds, while isoprene represented only 17%. Uncertainties determined were always below 13% for the six major terpenes. Uncertainties may be larger for the other compounds especially for those presenting a mixing ratio close to the detection limit. 25

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Section: Ozone Removalmentioning

confidence: 99%

Optimization of a gas chromatographic unit for measuring BVOCs in ambient air

Mermet

Sauvage

Dusanter

et al. 2019

Preprint

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“…[7][8][9] However, the development and implementation of instrumentation and methods for real-time vapor sampling has begun to replace these older, time-averaged sampling methods.…”

Section: Ormentioning

confidence: 98%

Effects of Silcosteel� transfer line on the sampling of volatile organic compounds

Thompson

Wise

1998

Field Analyt. Chem. Technol.

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“…VOCs are commonly sampled in stainless-steel canisters or Tedlar bags (Gholson et al, 1989;Koziel et al, 2005;McClenny et al, 1991) for gas chromatographic analysis in the laboratory. U.S. EPA's (2017b) Photochemical Assessment Monitoring Stations (PAMS) have acquired a large database of VOC concentrations (Watson et al, 2001) by this method, but it is switching to continuous in situ gas chromatographs (GCs).…”

Section: Volatile Organic Compoundsmentioning

confidence: 99%

Air quality measurements—From rubber bands to tapping the rainbow

Hidy¹,

Mueller²,

Altshuler

et al. 2017

Journal of the Air & Waste Management Association

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It is axiomatic that good measurements are integral to good public policy for environmental protection. The generalized term for "measurements" includes sampling and quantitation, data integrity, documentation, network design, sponsorship, operations, archiving, and accessing for applications. Each of these components has evolved and advanced over the last 200 years as knowledge of atmospheric chemistry and physics has matured. Air quality was first detected by what people could see and smell in contaminated air. Gaseous pollutants were found to react with certain materials or chemicals, changing the color of dissolved reagents such that their light absorption at selected wavelengths could be related to both the pollutant chemistry and its concentration. Airborne particles have challenged the development of a variety of sensory devices and laboratory assays for characterization of their enormous range of physical and chemical properties. Advanced electronics made possible the sampling, concentration, and detection of gases and particles, both in situ and in laboratory analysis of collected samples. Accurate and precise measurements by these methods have made possible advanced air quality management practices that led to decreasing concentrations over time. New technologies are leading to smaller and cheaper measurement systems that can further expand and enhance current air pollution monitoring networks. Implications: Ambient air quality measurement systems have a large influence on air quality management by determining compliance, tracking trends, elucidating pollutant transport and transformation, and relating concentrations to adverse effects. These systems consist of more than just instrumentation, and involve extensive support efforts for siting, maintenance, calibration, auditing, data validation, data management and access, and data interpretation. These requirements have largely been attained for criteria pollutants regulated by National Ambient Air Quality Standards, but they are rarely attained for nonroutine measurements and research studies.

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Canister-Based Method for Monitoring Toxic VOCs in Ambient Air

Cited by 75 publications

References 15 publications

Optimization of a gas chromatographic unit for measuring BVOCs in ambient air

Optimization of a gas chromatographic unit for measuring BVOCs in ambient air

Effects of Silcosteel� transfer line on the sampling of volatile organic compounds

Air quality measurements—From rubber bands to tapping the rainbow

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