A deuterium-labeling study on the reproduction of hydronium ions in the PTR-MS detection of ethanol

Inomata, Satoshi; Tanimoto, Hiroshi

doi:10.1016/j.ijms.2009.05.001

Cited by 23 publications

(18 citation statements)

References 20 publications

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“…As a comparison point, estimated concentrations using this assumption would have an uncertainty of −40% to +60% for the range of compounds specially calibrated except ethanol. As previously reported, the sensitivity factor of ethanol was almost one‐order‐of‐magnitude lower than other VOCs …”

Section: Methodssupporting

confidence: 78%

Characterizing sources and emissions of volatile organic compounds in a northern California residence using space‐ and time‐resolved measurements

et al. 2019

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We investigate source characteristics and emission dynamics of volatile organic compounds (VOCs) in a single‐family house in California utilizing time‐ and space‐resolved measurements. About 200 VOC signals, corresponding to more than 200 species, were measured during 8 weeks in summer and five in winter. Spatially resolved measurements, along with tracer data, reveal that VOCs in the living space were mainly emitted directly into that space, with minor contributions from the crawlspace, attic, or outdoors. Time‐resolved measurements in the living space exhibited baseline levels far above outdoor levels for most VOCs; many compounds also displayed patterns of intermittent short‐term enhancements (spikes) well above the indoor baseline. Compounds were categorized as “high‐baseline” or “spike‐dominated” based on indoor‐to‐outdoor concentration ratio and indoor mean‐to‐median ratio. Short‐term spikes were associated with occupants and their activities, especially cooking. High‐baseline compounds indicate continuous indoor emissions from building materials and furnishings. Indoor emission rates for high‐baseline species, quantified with 2‐hour resolution, exhibited strong temperature dependence and were affected by air‐change rates. Decomposition of wooden building materials is suggested as a major source for acetic acid, formic acid, and methanol, which together accounted for ~75% of the total continuous indoor emissions of high‐baseline species.

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Section: Methodssupporting

confidence: 78%

Characterizing sources and emissions of volatile organic compounds in a northern California residence using space‐ and time‐resolved measurements

et al. 2019

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“…This behavior could be attributed to another, unidentified fragment ion, not measured with the PTR-MS. It is possible that an unidentified product ion would lead to confusion about branching ratios as shown by Inomata and Tanimoto [31].…”

Section: Discussionmentioning

confidence: 99%

Optimization and sensitive detection of sulfur compounds emitted from plants using proton transfer reaction mass spectrometry

Samudrala

Brown

Mandon

et al. 2015

International Journal of Mass Spectrometry

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“…3. Due to the fragmentation of ethanol in the PTR-MS measurement (around 10 %; Inomata and Tanimoto, 2009), the concentration corresponding to mass 47 was corrected based on direct calibration under the assumption that mass 47 is solely due to ethanol. The highest peaks of the scan were at the following masses (m/z): 47, 33, 45, 61, 43, 73, 59, 75, 57 and 41. From the VOCs typically found in the highest concentrations in barns and feeding material (Shaw et al, 2007;Chung et al, 2009;Howard et al, 2010;Malkina et al, 2011;Hafner et al, 2013) and the scan results, a list of VOCs were selected.…”

Section: Experiments 2: Voc Selection Testmentioning

confidence: 99%

Photoacoustic measurement with infrared band-pass filters significantly overestimates NH<sub>3</sub> emissions from cattle houses due to volatile organic compound (VOC) interferences

et al. 2020

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Abstract. Infrared (IR) photoacoustic spectroscopy (PAS) using band-pass filters is a widely used method for measurement of NH3 and greenhouse gas emissions (CH4, N2O and CO2) especially in agriculture, but non-targeted gases such as volatile organic compounds (VOCs) from cattle barns may interfere with target gases, causing inaccurate results. This study made an estimation of NH3 interference in PAS caused by selected non-targeted VOCs which were simultaneously measured by a PAS and a PTR-MS (proton-transfer-reaction mass spectrometry). Laboratory calibrations were performed for NH3 measurement, and VOCs were selected based on a headspace test of the feeding material (maize silage). Strong interferences of VOCs were observed on NH3 and greenhouse emissions measured by PAS. Particularly, ethanol, methanol, 1-butanol, 1-propanol and acetic acid were found to have the highest interferences on NH3, giving empirical relationships in the range of 0.7 to 3.3 ppmv NH3 per ppmv VOC. A linear response was typically obtained, except for a nonlinear relation for VOCs on N2O concentration. The corrected online NH3 concentrations measured by PAS in a dairy farm (with empirical relationships 2.1±0.8 and 2.9±1.9 for Location 1 and Location 2, respectively) were confirmed to be correlated (R2=0.73 and 0.79) to the NH3 concentration measured simultaneously by the PTR-MS when the empirical corrections obtained from single VOC tests were applied.

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A deuterium-labeling study on the reproduction of hydronium ions in the PTR-MS detection of ethanol

Cited by 23 publications

References 20 publications

Characterizing sources and emissions of volatile organic compounds in a northern California residence using space‐ and time‐resolved measurements

Characterizing sources and emissions of volatile organic compounds in a northern California residence using space‐ and time‐resolved measurements

Optimization and sensitive detection of sulfur compounds emitted from plants using proton transfer reaction mass spectrometry

Photoacoustic measurement with infrared band-pass filters significantly overestimates NH<sub>3</sub> emissions from cattle houses due to volatile organic compound (VOC) interferences

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A deuterium-labeling study on the reproduction of hydronium ions in the PTR-MS detection of ethanol

Cited by 23 publications

References 20 publications

Characterizing sources and emissions of volatile organic compounds in a northern California residence using space‐ and time‐resolved measurements

Characterizing sources and emissions of volatile organic compounds in a northern California residence using space‐ and time‐resolved measurements

Optimization and sensitive detection of sulfur compounds emitted from plants using proton transfer reaction mass spectrometry

Photoacoustic measurement with infrared band-pass filters significantly overestimates NH&lt;sub&gt;3&lt;/sub&gt; emissions from cattle houses due to volatile organic compound (VOC) interferences

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Photoacoustic measurement with infrared band-pass filters significantly overestimates NH<sub>3</sub> emissions from cattle houses due to volatile organic compound (VOC) interferences