scholarly journals Evaluation of Fast Mobility Particle Sizer (FMPS) for Ambient Aerosol Measurement

2021 ◽  
Vol 21 ◽  
Author(s):  
Yue Lin ◽  
Liem Pham ◽  
Xiaoliang Wang ◽  
Roya Bahreini ◽  
Heejung S. Jung
Keyword(s):  
Ambient Aerosol ◽  
Aerosol Measurement ◽  
Particle Sizer

scholarly journals Measurement of the ambient organic aerosol volatility distribution: application during the Finokalia Aerosol Measurement Experiment (FAME-2008)

2010 ◽  
Vol 10 (7) ◽  
pp. 17435-17466 ◽  
Author(s):  
B. H. Lee ◽  
E. Kostenidou ◽  
L. Hildebrandt ◽  
I. Riipinen ◽  
G. J. Engelhart ◽  
...  
Keyword(s):  
Particle Density ◽  
Collection Efficiency ◽  
Eastern Mediterranean ◽  
Organic Aerosol ◽  
Accommodation Coefficient ◽  
Scanning Mobility Particle Sizer ◽  
Aerosol Dynamics ◽  
Aerosol Measurement ◽  
Measurement Experiment ◽  
Particle Sizer

Abstract. A variable residence time thermodenuder (TD) was combined with an Aerodyne Aerosol Mass Spectrometer (AMS) and a Scanning Mobility Particle Sizer (SMPS) to measure the volatility distribution of aged organic aerosol in the Eastern Mediterranean during the Finokalia Aerosol Measurement Experiment in May of 2008 (FAME-2008). A new method for the quantification of the organic aerosol volatility distribution was developed combining measurements of all three instruments together with an aerosol dynamics model. Challenges in the interpretation of ambient thermodenuder-AMS measurements include the potential resistances to mass transfer during particle evaporation, the effects of particle size on the evaporated mass fraction, the changes in the AMS collection efficiency and particle density as the particles evaporate partially in the TD, and finally potential losses inside the TD. Our proposed measurement and data analysis method accounts for all of these problems combining the AMS and SMPS measurements. The AMS collection efficiency of the aerosol that passed through the TD was found to be approximately 10% lower than the collection efficiency of the aerosol that passed through the bypass. The organic aerosol measured at Finokalia is approximately 2 orders of magnitude less volatile than fresh laboratory-generated biogenic secondary organic aerosol. This low volatility is consistent with its highly oxygenated AMS mass spectrum. The results are found to be highly sensitive to the mass accommodation coefficient of the evaporating species.

scholarly journals Measurement of the ambient organic aerosol volatility distribution: application during the Finokalia Aerosol Measurement Experiment (FAME-2008)

2010 ◽  
Vol 10 (24) ◽  
pp. 12149-12160 ◽  
Author(s):  
B. H. Lee ◽  
E. Kostenidou ◽  
L. Hildebrandt ◽  
I. Riipinen ◽  
G. J. Engelhart ◽  
...  
Keyword(s):  
Particle Density ◽  
Collection Efficiency ◽  
Eastern Mediterranean ◽  
Organic Aerosol ◽  
Accommodation Coefficient ◽  
Scanning Mobility Particle Sizer ◽  
Aerosol Dynamics ◽  
Aerosol Measurement ◽  
Measurement Experiment ◽  
Particle Sizer

Abstract. A variable residence time thermodenuder (TD) was combined with an Aerodyne Aerosol Mass Spectrometer (AMS) and a Scanning Mobility Particle Sizer (SMPS) to measure the volatility distribution of aged organic aerosol in the Eastern Mediterranean during the Finokalia Aerosol Measurement Experiment in May of 2008 (FAME-2008). A new method for the quantification of the organic aerosol volatility distribution was developed combining measurements of all three instruments together with an aerosol dynamics model. Challenges in the interpretation of ambient thermodenuder-AMS measurements include the potential resistances to mass transfer during particle evaporation, the effects of particle size on the evaporated mass fraction, the changes in the AMS collection efficiency and particle density as the particles evaporate partially in the TD, and finally potential losses inside the TD. Our proposed measurement and data analysis method accounts for all of these problems combining the AMS and SMPS measurements. The AMS collection efficiency of the aerosol that passed through the TD was found to be approximately 10% lower than the collection efficiency of the aerosol that passed through the bypass. The organic aerosol measured at Finokalia is approximately 2 or more orders of magnitude less volatile than fresh laboratory-generated monoterpene (α-pinene, β-pinene and limonene under low NOx conditions) secondary organic aerosol. This low volatility is consistent with its highly oxygenated AMS mass spectrum. The results are found to be highly sensitive to the mass accommodation coefficient of the evaporating species. This analysis is based on the assumption that there were no significant reactions taking place inside the thermodenuder.

scholarly journals Analyse der Partikelbildung aus der Elektrospray‐Flammensprühpyrolyse mittels Scanning Mobility Particle Sizer

2021 ◽  
Author(s):  
Malte Bierwirth ◽  
Vinzent Olszok ◽  
Varun Aiyar Ganesan ◽  
Jalal Poostforooshan ◽  
Alfred P. Weber
Keyword(s):  
Scanning Mobility Particle Sizer ◽  
Particle Sizer

scholarly journals Ultrafine Aerosol Particle Sizer Based on Piezoresistive Microcantilever Resonators with Integrated Air-Flow Channel

Sensors ◽  
2021 ◽  
Vol 21 (11) ◽  
pp. 3731
Author(s):  
Maik Bertke ◽  
Ina Kirsch ◽  
Erik Uhde ◽  
Erwin Peiner
Keyword(s):  
Mass Concentration ◽  
Limit Of Detection ◽  
A Priori ◽  
Micro Electro Mechanical System ◽  
Single Chip ◽  
Air Stream ◽  
Mems Technology ◽  
Clean Air ◽  
Particle Sizer ◽  
Ultrafine Aerosol

To monitor airborne nano-sized particles (NPs), a single-chip differential mobility particle sizer (DMPS) based on resonant micro cantilevers in defined micro-fluidic channels (µFCs) is introduced. A size bin of the positive-charged fraction of particles herein is separated from the air stream by aligning their trajectories onto the cantilever under the action of a perpendicular electrostatic field of variable strength. We use previously described µFCs and piezoresistive micro cantilevers (PMCs) of 16 ng mass fabricated using micro electro mechanical system (MEMS) technology, which offer a limit of detection of captured particle mass of 0.26 pg and a minimum detectable particulate mass concentration in air of 0.75 µg/m3. Mobility sizing in 4 bins of a nebulized carbon aerosol NPs is demonstrated based on finite element modelling (FEM) combined with a-priori knowledge of particle charge state. Good agreement of better than 14% of mass concentration is observed in a chamber test for the novel MEMS-DMPS vs. a simultaneously operated standard fast mobility particle sizer (FMPS) as reference instrument. Refreshing of polluted cantilevers is feasible without de-mounting the sensor chip from its package by multiply purging them alternately in acetone steam and clean air.

scholarly journals Ambient Aerosol Measurements in Different Environments

Atmosphere ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 429
Author(s):  
Aikaterini Bougiatioti ◽  
Evangelia Kostenidou
Keyword(s):  
Particulate Matter ◽  
Anthropogenic Sources ◽  
Heterogeneous Mixture ◽  
Ambient Aerosol

Particulate matter (PM) in the atmosphere has diverse natural and anthropogenic sources, and is a complex, heterogeneous mixture [...]

scholarly journals Microscopic Evidence for Phase Separation of Organic Species and Inorganic Salts in Fine Ambient Aerosol Particles

2021 ◽  
Vol 55 (4) ◽  
pp. 2234-2242
Author(s):  
Weijun Li ◽  
Lei Liu ◽  
Jian Zhang ◽  
Liang Xu ◽  
Yuanyuan Wang ◽  
...  
Keyword(s):  
Phase Separation ◽  
Aerosol Particles ◽  
Inorganic Salts ◽  
Ambient Aerosol ◽  
Organic Species ◽  
Microscopic Evidence

First Quantification of Imidazoles in Ambient Aerosol Particles: Potential Photosensitizers, Brown Carbon Constituents, and Hazardous Components

2016 ◽  
Vol 50 (3) ◽  
pp. 1166-1173 ◽  
Author(s):  
Monique Teich ◽  
Dominik van Pinxteren ◽  
Simonas Kecorius ◽  
Zhibin Wang ◽  
Hartmut Herrmann
Keyword(s):  
Aerosol Particles ◽  
Brown Carbon ◽  
Ambient Aerosol
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