Chemical characterization of submicron aerosol particles during wintertime in a northwest city of China using an Aerodyne aerosol mass spectrometry

2017 ◽  
Vol 222 ◽  
pp. 567-582 ◽  
Author(s):  
Xinghua Zhang ◽  
Yangmei Zhang ◽  
Junying Sun ◽  
Yangchun Yu ◽  
Francesco Canonaco ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Aerosol Particles ◽  
Chemical Characterization ◽  
Submicron Aerosol ◽  
Aerosol Mass ◽  
Aerosol Mass Spectrometry

scholarly journals Laboratory and field evaluation of the Aerosol Dynamics Inc. concentrator (ADIc) for aerosol mass spectrometry

2019 ◽  
Author(s):  
Sanna Saarikoski ◽  
Leah R. Williams ◽  
Steven R. Spielman ◽  
Gregory S. Lewis ◽  
Arantzazu Eiguren-Fernandez ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Concentration Factor ◽  
Ultrafine Particles ◽  
Ultrafine Particle ◽  
Chemical Characterization ◽  
Field Evaluation ◽  
Aerosol Dynamics ◽  
Aerosol Mass ◽  
Aerosol Mass Spectrometry ◽  
Road Paving

Abstract. An air-to-air ultrafine particle concentrator (Aerosol Dynamics Inc. concentrator; ADIc) has been designed to enhance on-line chemical characterization of ambient aerosols by aerosol mass spectrometry. The ADIc employs a three-stage, moderated water-based condensation growth tube coupled to an aerodynamic focusing nozzle to concentrate ultrafine particles into a portion of the flow. The system can be configured to sample between 1.0–1.7 L min−1 with an output concentrated flow between 0.08–0.12 L min−1, resulting in a theoretical concentration factor (sample flow/output flow) ranging from 8 to 21. Laboratory tests with monodisperse particles show that the ADIc is effective for particles as small as 10 nm. Laboratory experiments conducted with the Aerosol Mass Spectrometer (AMS) showed no shift in the particle size after the ADIc, as measured by the AMS particle time-of-flight. The ADIc-AMS system was operated unattended over a one-month period near Boston, Massachusetts. Comparison to a parallel AMS without the concentrator showed concentration factors of 9.7 ± 0.15 and 9.1 ± 0.1 for sulfate and nitrate, respectively, when operated with a theoretical concentration factor of 10.5 ± 0.3. Concentration factor of organics was lower, possibly due to the presence of large particles from nearby road-paving operations, and a difference in aerodynamic lens cutoff between the two AMS instruments. Another field deployment was carried out in Helsinki, Finland. Two ~ 10-day measurement periods showed good correlation for the concentrations of organics, sulfate, nitrate and ammonium measured with an Aerosol Chemical Speciation Monitor (ACSM) after the ADIc, and a parallel AMS without the concentrator. Additional experiments with an AMS alternating between the ADIc and a bypass line demonstrated that the concentrator did not change the size distribution or the chemistry of the ambient aerosol particles.

scholarly journals In-situ characterization of metal nanoparticles and their organic coatings using laser-vaporization aerosol mass spectrometry

Nano Research ◽  
2015 ◽  
Vol 8 (12) ◽  
pp. 3780-3795 ◽  
Author(s):  
Patrik T. Nilsson ◽  
Axel C. Eriksson ◽  
Linus Ludvigsson ◽  
Maria E. Messing ◽  
Erik Z. Nordin ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Metal Nanoparticles ◽  
Organic Coatings ◽  
Laser Vaporization ◽  
In Situ Characterization ◽  
Aerosol Mass ◽  
Aerosol Mass Spectrometry
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