From the HOMEChem frying pan to the outdoor atmosphere: chemical composition, volatility distributions and fate of cooking aerosol

Pothier, Matson A.; Boedicker, Erin K.; Pierce, Jeffrey R.; Vance, Marina E.; Farmer, Delphine K.

doi:10.1039/d2em00250g

Cited by 4 publications

(7 citation statements)

References 66 publications

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“…Two distinct VBS profiles of particle-phase OM owing to each factor were published by Pothier et al, corresponding to two stir-fry experiments. These profiles reported OM concentrations (not emission rates) in VBS bins between 10 –5 and 10 2 μg m –3 .…”

Section: Methodsmentioning

confidence: 97%

“…• Miscellaneous OA factor (mOA) refers to the sum of the hydrocarbon-like and oven-associated HR-AMS factors as well as the cooking oil #1 ACSM factor. The volatility profiles that Pothier et al 35 published (and are ultimately used to inform the characteristic unit mass emission profiles in this work) correspond to the three ACSM factors. However, the relative apportionment of the three factors relating to the ACSM concentration time series was only provided at either one or two points in time (corresponding to the two COA spikes during the vegetable and sauce phases, respectively) and for only nine of the 16 experiments.…”

Section: Application To Homechem Stir-frying 221 Oa Datamentioning

confidence: 94%

“…Throughout each experiment, measurements were taken with a high-resolution time-of-flight aerosol mass spectrometer (HR-AMS) , and a time-of-flight aerosol chemical speciation monitor (ACSM), , coupled to a thermodenuder . More information relating to the experimental setups of this equipment during the HOMEChem campaign can be found in Katz et al (regarding the HR-AMS), Pothier et al (regarding the thermodenuder and the ACSM), and Sections S1 and S2 of the SI. The sampling inlets of this equipment were located in the kitchen less than 5 m from the stove.…”

Section: Methodsmentioning

confidence: 99%

“…Much smaller amounts (∼10%) of the remaining two HR-AMS factors were observed during stir-frying. As for the ACSM data, PMF was performed only during stir-frying, so its results were somewhat distinct from the HR-AMS factors; 35 most notably, just three factors were produced from this procedure. However, in both composition and behavior, Pothier et al's 35 cooking oil #2 factor corresponds reasonably well with the soybean oil HR-AMS factor, their biomass-burning-like factor corresponds reasonably well with the burning/browning HR-AMS factor, and their cooking oil #1 factor corresponds reasonably well with the two HR-AMS factors that were nondominant during stir-frying (as demonstrated in Section S3 of the SI).…”

Section: Application To Homechem Stir-frying 221 Oa Datamentioning

confidence: 99%

“…Pothier et al 35 provide the first known VBS characterization of COA from near-source indoor measurements taken during cooking in a residential setting. They assessed two stir-fry experiments and found the emitted OA to possess three chemical signatures (called OA factors): a biomass-burning-like component and two components associated with cooking oils.…”

Section: Introductionmentioning

confidence: 99%

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Model Framework for Predicting Semivolatile Organic Material Emissions Indoors from Organic Aerosol Measurements: Applications to HOMEChem Stir-Frying

Cummings,

Pothier,

Katz

et al. 2023

Environ. Sci. Technol.

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Cooking activities emit myriad low-volatility, semivolatile, and highly volatile organic compounds that together form particles that can accumulate to large indoor concentrations. Absorptive partitioning thermodynamics governs the particle-phase organic aerosol concentration mainly via temperature and sorbing mass impacts. Cooking activities can increase the organic sorbing mass by 1−2 orders of magnitude, increasing particle-phase concentrations and affecting emission rate calculations. Although recent studies have begun to probe the volatility characteristics of indoor cooking particles, parametrizations of cooking particle mass emissions have largely neglected these thermodynamic considerations. Here, we present an improved thermodynamics-based model framework for estimating condensable organic material emission rates from a time series of observed concentrations, given that adequate measurements or assumptions can be made about the volatility of the emitted species. We demonstrate the performance of this methodology by applying data from stir-frying experiments performed during the House Observations of Microbial and Environmental Chemistry (HOMEChem) campaign to a two-zone box model representing the UTest House. Preliminary estimates of organic mass emitted on a per-stir-fry basis for three types of organic aerosol factors are presented. Our analysis highlights that using traditional nonvolatile particle models and emission characterizations for some organic aerosol emitting activities can incorrectly attribute concentration changes to emissions rather than thermodynamic effects.

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Section: Methodsmentioning

confidence: 97%

Section: Application To Homechem Stir-frying 221 Oa Datamentioning

confidence: 94%