Skin volatile organic compound emissions from 14 healthy young adults under controlled conditions

Zou, Ziwei; Yang, Xinyun

doi:10.1016/j.buildenv.2022.109416

Cited by 16 publications

(7 citation statements)

References 39 publications

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“…These results highlight the importance of considering baseline emission in a surface-yield-based modeling scheme. Some previous studies also detected considerable emissions of certain ozonolysis products of skin oil in the absence of ozone, 4,32,38 but the implication has not been clearly called out. As a further note, the relative standard deviations of the fitted baseline emission fluxes are overall larger than those of the surface yields (Table 1 and Table S3), suggesting that the baseline emissions might vary considerably among individuals and from time to time.…”

Section: Ozone-dependent Voc Emissions From the Human Bodymentioning

confidence: 94%

“…It consists of a 1.5 m 3 stainless-steel test chamber and a transition chamber, with precise environmental control systems (Figures S1 and S2). In contrast to prior experiments conducted in this chamber, − we operated it in continuous flow mode rather than airtight mode, with air introduced at the bottom and exhausted at the top. The ventilation rate was kept at ∼3 m 3 /h, corresponding to an air change rate of 2.1 ± 0.2 h –1 .…”

Section: Methodsmentioning

confidence: 99%

“…These substances are present not only on the human body but also in many cooking oils and consumer products. Some previous studies have also reported considerable production of nonanal and hexanal, 4,30,38 which were thought to come from exogenous lipids, 4,30 such as those on the clothing of the human subjects. 4 Additional experiments in this study show that secondary emission from laundered clothing used in the experiments can explain almost all of the hexenal emissions observed, and about half of the nonanal emissions, while having a negligible effect on the decanal emissions (Figure S6).…”

Section: Conversely Y Ih and Ef Ihmentioning

confidence: 97%

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Quantifying Ozone-Dependent Emissions of Volatile Organic Compounds from the Human Body

Qu,

Zou,

Weschler

et al. 2023

Environ. Sci. Technol.

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Ozone reactions on human body surfaces produce volatile organic compounds (VOCs) that influence indoor air quality. However, the dependence of VOC emissions on the ozone concentration has received limited attention. In this study, we conducted 36 sets of single-person chamber experiments with three volunteers exposed to ozone concentrations ranging from 0 to 32 ppb. Emission fluxes from human body surfaces were measured for 11 targeted skin-oil oxidation products. For the majority of these products, the emission fluxes linearly correlated with ozone concentration, indicating a constant surface yield (moles of VOC emitted per mole of ozone deposited). However, for the second-generation oxidation product 4-oxopentanal, a higher surface yield was observed at higher ozone concentrations. Furthermore, many VOCs have substantial emissions in the absence of ozone. Overall, these results suggest that the complex surface reactions and mass transfer processes involved in ozone-dependent VOC emissions from the human body can be represented using a simplified parametrization based on surface yield and baseline emission flux. Values of these two parameters were quantified for targeted products and estimated for other semiquantified VOC signals, facilitating the inclusion of ozone/skin oil chemistry in indoor air quality models and providing new insights on skin oil chemistry.

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Section: Ozone-dependent Voc Emissions From the Human Bodymentioning

confidence: 94%

Section: Methodsmentioning

confidence: 99%

Section: Conversely Y Ih and Ef Ihmentioning

confidence: 97%

See 1 more Smart Citation

Quantifying Ozone-Dependent Emissions of Volatile Organic Compounds from the Human Body

Qu,

Zou,

Weschler

et al. 2023

Environ. Sci. Technol.

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“…56 These two compounds were previously detected during skin/sweat VOC analyses. 6,15,35 We also detected other endogenous compounds: butanol, acetone, propionic acid, butyric acid, capric acid, and pentadecanoic acid (Table S8). Their presence on the skin is expected based on the previous reports.…”

Section: ■ Results and Discussionmentioning

confidence: 97%

“…1 These VOCs are emitted due to metabolic activities, 2 interactions with microbiota, 3 and environmental exposure. 4 In recent studies, several factors that can influence profiles of VOCs emitted from the human skin have been identified: (i) systemic diseases; 5 (ii) metabolic activity changes related to age; 6 (iii) dietary intake; 7 and (iv) endogenous compounds in blood vessels that pass the skin barrier. 8 Additionally, environmental factors and personal habits, such as physical activity, personal hygiene, and cosmetic use, can also influence the presence of VOCs on the skin.…”

Section: ■ Introductionmentioning

confidence: 99%

Mass Specthoscope: A Hand-held Extendable Probe for Localized Noninvasive Sampling of Skin Volatome for Online Analysis

Abu Bakar,

Chiu,

Urban

2023

Anal. Chem.

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Human skin emits a unique set of volatile organic compounds (VOCs). These VOCs can be probed in order to obtain physiological information about the individuals. However, extracting the VOCs that emanate from human skin for analysis is troublesome and time-consuming. Therefore, we have developed “Mass Specthoscope”a convenient tool for rapid sampling and detecting VOCs emitted by human skin. The hand-held probe with a pressurized tip and wireless button enables sampling VOCs from surfaces and their transfer to the atmospheric pressure chemical ionization source of quadrupole time-of-flight mass spectrometer. The system was characterized using chemical standards (acetone, benzaldehyde, sulcatone, α-pinene, and decanal). The limits of detection are in the range from 2.25 × 10–5 to 3.79 × 10–5 mol m–2. The system was initially tested by detecting VOCs emanating from porcine skin spiked with VOCs as well as unspiked fresh and spoiled ham. In the main test, the skin of nine healthy participants was probed with the Mass Specthoscope. The sampling regions included the armpit, forearm, and forehead. Numerous skin-related VOC signals were detected. In the final test, one participant ingested a fenugreek drink, and the participant’s skin surface was probed using the Mass Specthoscope hourly during the 8 h period. The result revealed a gradual release of fenugreek-related VOCs from the skin. We believe that this analytical approach has the potential to be used in metabolomic studies and following further identification of disease biomarkersalso in noninvasive diagnostics.

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Performance enhancement analysis of a liquid desiccant dehumidifier with internal cooling for indoor benzene removal

Huang,

Fu,

Wen

2024

Applied Thermal Engineering

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Skin volatile organic compound emissions from 14 healthy young adults under controlled conditions

Cited by 16 publications

References 39 publications

Quantifying Ozone-Dependent Emissions of Volatile Organic Compounds from the Human Body

Quantifying Ozone-Dependent Emissions of Volatile Organic Compounds from the Human Body

Mass Specthoscope: A Hand-held Extendable Probe for Localized Noninvasive Sampling of Skin Volatome for Online Analysis

Performance enhancement analysis of a liquid desiccant dehumidifier with internal cooling for indoor benzene removal

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