Real-Time Characterization of the Composition of Individual Particles Emitted From Ultrafine Particle Concentrators

Su, Yongxuan; Sipin, Michele F.; Spencer, Matthew T.; Qin, Xueying; Moffet, Ryan C.; Shields, Laura G.; Prather, Kimberly A.; Venkatachari, Prasanna; Jeong, Cheol–Heon; Kim, Eugene; Hopke, Philip K.; Gelein, Robert; Utell, Mark J.; Oberdörster, G.; Berntsen, Jon; Devlin, Robert B.; Chen, Lung Chi

doi:10.1080/02786820600660887

Cited by 23 publications

(41 citation statements)

References 67 publications

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“…This hypothesis of irreversible growth is explored in greater detail in the companion article ). This hypothesis is also consistent with the observed shift in size distribution at Rochester and Boston where ambient particles had a mode at ∼10 to 20 nm and no shift at Chapel Hill with a mode at ∼70 to 100 nm (Su et al 2006). Irreversible growth through the addition of fg/particle amounts of mass would cause 10-20 nm particles to grow substantially, while the shift for 100 nm particles might not be detectable.…”

Section: Particle Size Distributionsupporting

confidence: 76%

“…This growth was also apparent in the form of much higher CEFs for organics than that for ammonium salts . Su et al (2006) also observed additional organic mass in concentrated ultrafine particles. This hypothesis of irreversible growth is explored in greater detail in the companion article ).…”

Section: Particle Size Distributionmentioning

confidence: 89%

“…The mode of the particle-number-based size distribution shifted from ∼25 nm for ambient particles to ∼90 nm for concentrated particles. Su et al (2006) documented the characterization of Harvard's high-volume ultrafine concentrators at various locations (Rochester, Boston, and Chapel Hill). They also observed a shift in size distribution at Rochester and Boston where ambient particles had a mode at ∼10 to 20 nm.…”

Section: Particle Size Distributionmentioning

confidence: 99%

“…Consequently, condensation/evaporation technologies have been developed for concentrating ultrafine particles. Only a few studies have documented the performance of different concentrators during (Sioutas et al 1995;Demokritou et al 2002Demokritou et al , 2003Gupta et al 2004aGupta et al , 2004b or after their development (Sioutas et al 1997;Lawrence et al 2004;Su et al 2006). For example, the concentration enrichment factor (CEF) of a fine concentrator (for particle >0.15 µm) was reported to be affected by the mass median aerodynamic diameter (MMAD) of the ambient PM (Lawrence et al 2004).…”

Section: Introductionmentioning

confidence: 99%

“…For example, the concentration enrichment factor (CEF) of a fine concentrator (for particle >0.15 µm) was reported to be affected by the mass median aerodynamic diameter (MMAD) of the ambient PM (Lawrence et al 2004). In the case of quasi-ultrafine particles (<200 nm), the concentrator's performance was reported to depend on both the physical and chemical characteristics of the PM as a result of the water condensation-evaporation process used to grow the ultrafine particles and then dry them back to their original size (Gupta et al 2004b;Su et al 2006). During this concentration process, ultrafine particles experience supersaturation and heating, either of which may alter the properties from that of the original ambient particles (Gupta et al 2004b).…”

Section: Introductionmentioning

confidence: 99%

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Physical Characterization of the University of Toronto Coarse, Fine, and Ultrafine High-Volume Particle Concentrator Systems

Rastogi¹,

McWhinney²,

Akhtar³

et al. 2012

Aerosol Science and Technology

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Particle concentrators allow exposure to controlled levels of concentrated ambient particulate matter (PM) over a broad range of concentrations. The performance of these systems can be influenced by the physicochemical characteristics of PM and so it is vital to characterize the concentrators at a given site. The quasiultrafine PM (<0.2 µm), fine PM (0.15-2.5 µm), and coarse PM (2.5-10 µm) concentrators at the Southern Ontario Center for Atmospheric Aerosol Research (SOCAAR), University of Toronto, were characterized as a part of the "Health Effects of Aerosols in Toronto (HEAT)" campaign held during February-March, 2010. The full size distributions of ambient and concentrated particles were simultaneously measured in terms of number, surface area, and volume using high time-resolution instruments. Examination of the complete size distribution, including the unconcentrated particles beyond the cutpoints of the concentrator systems, revealed that particles in the unconcentrated size ranges made significant contributions to the particle number and surface area present in the concentrated airstreams of fine and coarse concentrators. Further transients in the ambient ultrafine particle concentrations were evident as dampened signals in these concentrated airstreams. The ultrafine concentrator exhibited a significant size shift when the ambient particle size distribution had a mode ≤30 nm. OverReceived 22 July 2011; accepted 29 March 2012. Funding for SOCAAR was provided by the Canadian Foundation for Innovation, the Ontario Innovation Trust, and the Ontario Research Fund. Operational funding for this study was provided by NSERC (Natural Sciences and Engineering Research Council of Canada) and CIHR (Canadian Institutes of Health Research). We also thank Gang Lu for his help in setting up the GRIMM dust monitor.Address correspondence to Neeraj Rastogi, Physical Research Laboratory, Navrangpura, Ahmedabad 380 009, India. E-mail: neeraj6676@gmail.com all the fine and coarse concentrators provided a reasonable concentrated reproduction of the ambient PM mass while questions remain regarding the representativeness of the ultrafine concentrator.

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Section: Particle Size Distributionsupporting

confidence: 76%

Section: Particle Size Distributionmentioning

confidence: 89%

Section: Particle Size Distributionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Physical Characterization of the University of Toronto Coarse, Fine, and Ultrafine High-Volume Particle Concentrator Systems

Rastogi¹,

McWhinney²,

Akhtar³

et al. 2012

Aerosol Science and Technology

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Mass spectrometry of atmospheric aerosols—Recent developments and applications. Part II: On‐line mass spectrometry techniques

Pratt

Prather

2011

Mass Spectrometry Reviews

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232

178

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Many of the significant advances in our understanding of atmospheric particles can be attributed to the application of mass spectrometry. Mass spectrometry provides high sensitivity with fast response time to probe chemically complex particles. This review focuses on recent developments and applications in the field of mass spectrometry of atmospheric aerosols. In Part II of this two-part review, we concentrate on real-time mass spectrometry techniques, which provide high time resolution for insight into brief events and diurnal changes while eliminating the potential artifacts acquired during long-term filter sampling. In particular, real-time mass spectrometry has been shown recently to provide the ability to probe the chemical composition of ambient individual particles <30 nm in diameter to further our understanding of how particles are formed through nucleation in the atmosphere. Further, transportable real-time mass spectrometry techniques are now used frequently on ground-, ship-, and aircraft-based studies around the globe to further our understanding of the spatial distribution of atmospheric aerosols. In addition, coupling aerosol mass spectrometry techniques with other measurements in series has allowed the in situ determination of chemically resolved particle effective density, refractive index, volatility, and cloud activation properties.

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Investigating aerosol chemistry using Real-Time Single Particle Mass Spectrometry: A viewpoint on its recent development

Wang

Zhang²,

Yang

2023

Applied Geochemistry

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Real-Time Characterization of the Composition of Individual Particles Emitted From Ultrafine Particle Concentrators

Cited by 23 publications

References 67 publications

Physical Characterization of the University of Toronto Coarse, Fine, and Ultrafine High-Volume Particle Concentrator Systems

Physical Characterization of the University of Toronto Coarse, Fine, and Ultrafine High-Volume Particle Concentrator Systems

Mass spectrometry of atmospheric aerosols—Recent developments and applications. Part II: On‐line mass spectrometry techniques

Investigating aerosol chemistry using Real-Time Single Particle Mass Spectrometry: A viewpoint on its recent development

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