Mass Spectrometry of Aerosols

Suess, David T.; Prather, Kimberly A.

doi:10.1021/cr980138o

Cited by 215 publications

(167 citation statements)

References 197 publications

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“…However, the ATOFMS can provide quantitative information on particle number as a function of composition; providing a measure of all particle components and can be used to assess mixing state. The ATOFMS provides information on the abundance of different types of aerosol particles as a function of particle size with high time resolution (Suess and Prather, 1999).…”

Section: Instrumentationmentioning

confidence: 99%

Real time chemical characterization of local and regional nitrate aerosols

et al. 2009

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Abstract. Nitrate aerosols make a very major contribution to PM 2.5 and PM 10 in western Europe, but their sources and pathways have not been fully elucidated. An Aerosol Time-of-Flight Mass Spectrometer (ATOFMS) and a Compact Time of Flight Aerosol Mass Spectrometer (C-ToF-AMS) were deployed in an urban background location in London, UK, collecting data as part of the REPARTEE-I experiment. During REPARTEE-I, daily PM 10 concentrations ranged up to 43.6 µg m −3 , with hourly nitrate concentrations (measured by AMS) of up to 5.3 µg m −3 . The application of the ART-2a neural network algorithm to the ATOFMS data characterised the nitrate particles as occurring in two distinct clusters (i.e. particle types). The first (33.6% of particles by number) appeared to be locally produced in urban locations during nighttime, whilst the second (22.8% of particles by number) was regionally transported from continental Europe. Nitrate in locally produced aerosol was present mainly in particles smaller than 300 nm, whilst the regional nitrate presented a coarser mode, peaking at 600 nm. In both aerosol types, nitrate was found to be internally mixed with sulphate, ammonium, elemental and organic carbon. Nitrate in regional aerosol appeared to be more volatile than that locally formed. During daytime, a core of the regionally transported nitrate aerosol particle type composed of organic carbon and sulphate was detected.Correspondence to: R. M. Harrison

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Section: Instrumentationmentioning

confidence: 99%

Real time chemical characterization of local and regional nitrate aerosols

et al. 2009

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“…The aerosol mass spectrometry technique has been used as a powerful tool to determine the chemical constituents of sub-micrometer atmospheric aerosols in real time (Suess and Prather 1999;Jayne et al 2000;McMurry 2000;Noble and Prather 2000;Allan et al 2003;Jimenez et al 2003;Middlebrook et al 2003;Dall'Osto et al 2004;Drewnick et al 2004;Topping et al 2004;Takami et al 2005;Takegawa et al 2005;Nash et al 2006;Canagaratna et al 2007;DeCarlo et al 2007;Liu et al 2007;Kamphus et al 2008). One of the popular methods of aerosol mass spectrometry instruments is to combine thermal vaporization and electron impact ionization (EI) with subsequent mass analysis of the produced ions by mass spectrometer.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Particle Bounce in Various Collection Substrates to be Used as Vaporizer in Aerosol Mass Spectrometer

Kang

Cho

Kwak

et al. 2015

Aerosol Science and Technology

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The determination of the collection efficiency (CE) of particles during transport, vaporization, and ionization in the aerosol mass spectrometer (AMS), which uses vaporizer to evaporate non-refractory particles with subsequent ionization, is important for accurately quantifying the concentrations of chemical constituents. Particle bounce in the vaporizer can be considered as one of the most important parameters influencing the CE of particles. Substrates with various shapes (flat, cylindrical, reverse-conical, cup, trapezoidal, and reverse-T), materials (stainless steel, copper, tungsten, and molybdenum), pores with average sizes of 0.2, 1, 5, 20, and 100 mm, and mesh with a size of 79 mm, which can be a possible candidate for the vaporizer in the AMS, were constructed. Bounce fractions of sub-micrometer particles (polystyrene latex, oleic acid, and dioctyl phthalate) were determined using the differential mobility analyzer (DMA)-impactor technique under a constant impact velocity. For the porous substrate, the particle bounce fraction significantly decreased with increasing pore size and porosity, but there was an upper limit for the pore size above which the particle bounce fraction no longer decreased significantly (i.e., the rebounded particles successfully escaped from the pores). The mesh substrate also had a lower particle bounce fraction than the flat substrate. Among the tested materials, the copper substrate having the lowest hardness and elasticity had the lowest particle bounce fraction. In addition, the reverse-T shape substrate having more available surfaces for particle entrapment led to the reduction of particle bounce fraction. In terms of phase, the liquid particles had lower particle bounce fractions than the solid particles. Our results suggest that the vaporizer in the AMS should provide traps for multiple collisions of the rebounding particles with an appropriate porosity or mesh and should be made of lowhardness materials to minimize particle bounce.

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“…The development of the aerosol mass spectrometer has been contributed greatly to the understanding about the gas-solid reactions and have been applied to tropospheric chemistry (Suess and Prather, 1999). This instrument has overcome many challenges inherent to the traditional off-line techniques, including sampling artifacts, analysis time, etc.…”

Section: Introductionmentioning

confidence: 99%

Online investigations on ozonation products of pyrene and benz[a]anthracene particles with a vacuum ultraviolet photoionization aerosol time-of-flight mass spectrometer

Gao

Zhang

Meng

et al. 2009

Atmospheric Environment

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a b s t r a c tThe reaction products of ozone with pyrene and benz [a]anthracene absorbed on azelaic acid particles under the pseudo-first-order reaction conditions have been investigated with a vacuum ultraviolet photoionization aerosol time-of-flight mass spectrometer (VUV-ATOFMS). The pyrene and benz [a]anthracene particles with the initial concentrations of w1 mg m À3 are respectively exposed to w22 ppm ozone in a reaction chamber with a volume of w180 L. The time-of-flight mass spectra of the particulate ozonides are obtained. The assignments of the mass spectra reveal that 4-carboxy-5-phenanthrenecarboxyaldehyde (71%) and hydroxypyrene (23%) are the main solid state ozonides of pyrene, while 2-(2-formyl)phenyl-3-naphthoic acid (35%), hydroxybenz[a]anthrone (30%), and benz[a]anthracene-7, 12-dione (18%) are the main solid state ozonides of benz [a]anthracene. The pathways of the ozonations are proposed in the paper.

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Mass Spectrometry of Aerosols

Cited by 215 publications

References 197 publications

Real time chemical characterization of local and regional nitrate aerosols

Real time chemical characterization of local and regional nitrate aerosols

Evaluation of Particle Bounce in Various Collection Substrates to be Used as Vaporizer in Aerosol Mass Spectrometer

Online investigations on ozonation products of pyrene and benz[a]anthracene particles with a vacuum ultraviolet photoionization aerosol time-of-flight mass spectrometer

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