Real time bipolar time-of-flight mass spectrometer for analyzing single aerosol particles

Li, Lei; Huang, Zhengxu; Dong, Jun; Li, Mei; Gao, Wei; Nian, Huiqing; Fu, Zhong; Zhang, Guohua; Bi, Xinhui; Cheng, Ping; Zhou, Zhen

doi:10.1016/j.ijms.2011.01.017

Cited by 258 publications

(156 citation statements)

References 37 publications

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“…Single particle detection procedure with SPAMS can be found elsewhere (Huang et al, 2010;Li et al, 2011). Briefly, aerosol individual particle is drawn into aerodynamic lens of SPAMS through a 0.1 mm critical orifice.…”

Section: Spamsmentioning

confidence: 99%

“…However, these methods suffer from some artifacts, such as evaporation and chemical reactions of particles during sample collection, storage and analysis (Bzdek et al, 2012;Lee and Allen, 2012). Single Particle Mass Spectrometry (SPMS) provides real-time size and chemical composition data for individual aerosol particles (Li et al, 2011;Prather et al, 1994). The development and application of SPMS during the past decades improve insight into gas-particle partitioning, heterogeneous reactions, and par-ticle sources (Creamean et al, 2013;Pratt and Prather, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…The reported studies focus on the measurements of mixing state of atmospheric aerosols, the formation mechanisms of secondary species in urban areas (e.g., Yang et al, 2009Yang et al, , 2012, and the formation of secondary organic aerosols in a chamber (Liang et al, 2005;Wang et al, 2006;Xia et al, 2004). Additionally, a commercialized single particle aerosol mass spectrometer (SPAMS) has also been developed (Huang et al, 2010;Li et al, 2011) and applied to on-line detection of single particles in the ambient atmosphere or directly from emission sources (e.g., He et al, 2013;Li et al, 2013). However, only the size and chemical compositions of single particles were analyzed in these studies.…”

Section: Introductionmentioning

confidence: 99%

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Measurement of aerosol effective density by single particle mass spectrometry

Zhang

Han

et al. 2015

Sci. China Earth Sci.

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Single particle mass spectrometry has been widely used to determine the size and chemical compositions of atmospheric aerosols; however, it is still rarely used for the microphysical properties measurement. In this study, two methods were developed for determining aerosol effective density by a single particle aerosol mass spectrometer (SPAMS). Method I retrieved effective density through comparison between measured light scattering intensities and Mie theoretical modelled partial scattering cross section. Method II coupled a differential mobility analyzer (DMA) with SPAMS to simultaneously determine the electric mobility and vacuum aerodynamic diameter, and thus the effective density. Polystyrene latex spheres, ammonium sulfate and sodium nitrate were tested by these methods to help validate their effectiveness for determining the aerosol effective density. This study effectively extends SPAMS measurements to include particle size, chemical composition, light scattering, and effective density, and thus helps us better understand the environment and climate effects of aerosols.

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Section: Spamsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Measurement of aerosol effective density by single particle mass spectrometry

Zhang

Han

et al. 2015

Sci. China Earth Sci.

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“…Single particle measurement was carried out in 2010 between April 30 and May 22, with occasional maintenance and recalibration stand-downs, using an SPAMS made by Hexin Analytical Instrument Co., Ltd (Li et al, 2011). The hourly variation of temperature, humidity, visibility and wind directions are presented in Figure S1 of the Supplementary Material.…”

Section: Samplingmentioning

confidence: 99%

“…Particles detection method of SPAMS has been described elsewhere (Li et al, 2011). Briefly, aerosol particles are introduced into vacuum pumped SPAMS through a 0.1 mm critical orifice at a flow of 80 mL min À1 due to the pressure drop from w760 to w2.2 Torr.…”

Section: Single Particle Mass Spectrometrymentioning

confidence: 99%

Mixing state of biomass burning particles by single particle aerosol mass spectrometer in the urban area of PRD, China

Bi¹,

Zhang²,

Li³

et al. 2011

Atmospheric Environment

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164

108

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Sources and atmospheric processes impacting oxalate at a suburban coastal site in Hong Kong: Insights inferred from 1 year hourly measurements

et al. 2015

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Oxalic acid is one of the most abundant dicarboxylic acids in the atmosphere, receiving a great deal of attention due to its potential influence on cloud condensation nucleus activities. In this work, we report 10 months of hourly oxalate measurements in particulate matter of less than 2.5 μm in aerodynamic diameter (PM 2.5 ) by a Monitor for Aerosols and Gases in ambient Air at a suburban coastal site in Hong Kong from April 2012 to February 2013. A total of more than 6000 sets of oxalate and inorganic ion data were obtained. The mean (±SD) oxalate concentration was 0.34 (±0.18) μg m À3 , accounting for 2.8% of the total ion mass and 1.5% of the PM 2.5 mass. Seasonal variation showed higher concentrations in fall and winter (0.54 and 0.36 μg m À3 , respectively) and lower concentrations in spring and summer (~0.26 μg m À3 ). Different from the inorganic ions, a shallow dip in the oxalate concentration consistently occurred in the morning after sunrise (around 9:00 A.M.) throughout all seasons. Our analysis suggests that this was likely due to photolysis of oxalate-Fe (III) complex under sunlight. In summer, a small daytime peak was discernable for oxalate and nitrate. This characteristic, together with a more evident diurnal variation of O 3 , indicates comparatively more active photochemical oxidation in summer than other seasons. High correlations were observed between oxalate and non-sea-salt SO 4 2À (NSS) (R 2 = 0.63) and O x (O 3 + NO 2 ) (R 2 = 0.48), indicating significant commonality in their secondary formation. Positive matrix factorization analysis of oxalate and other real-time gas and particle-phase component data estimates that secondary formation processes, including secondary gas or aqueous oxidation processes (49%), oxidation processes of biomass burning emissions (37%), accounted for the majority of PM 2.5 oxalate. A backward trajectories cluster analysis found that higher oxalate/NSS ratios were associated with low pollution samples under the influence of marine air masses while the ratios were lower in high pollution samples that were typically associated with continental air masses passing through areas of high anthropogenic emissions. Isolating the "low pollution marine" aerosols across the entire data set indicates that oxalate production increased in the summer compared to other seasons, suggesting either more active marine emissions of oxalate precursors or stronger photochemical processes in the summer.

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Real time bipolar time-of-flight mass spectrometer for analyzing single aerosol particles

Cited by 258 publications

References 37 publications

Measurement of aerosol effective density by single particle mass spectrometry

Measurement of aerosol effective density by single particle mass spectrometry

Mixing state of biomass burning particles by single particle aerosol mass spectrometer in the urban area of PRD, China

Sources and atmospheric processes impacting oxalate at a suburban coastal site in Hong Kong: Insights inferred from 1 year hourly measurements

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