<i>In situ</i>mass spectrometry and ion chemistry in the stratosphere and troposphere

Viggiano, A. A.

doi:10.1002/mas.1280120203

Cited by 78 publications

(63 citation statements)

References 103 publications

(147 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2), and Viggiano (1993) has made a description of the instrumentation used for measuring atmospheric ions. A review of atmospheric ion formation and different mechanisms for nucleation via ions was given by Harrison (2000).…”

Section: Ionsmentioning

confidence: 99%

The role of atmospheric ions in aerosol nucleation – a review

2008

View full text Add to dashboard Cite

Abstract. Atmospheric aerosols affect climate and yet the reason for many observed events of new aerosol formation is not understood. One of the theories put forward to explain these events is that the presence of ions can enhance the formation of aerosols. The theory is called Ion Induced Nucleation and in this paper the state of observations, theory and experiments within the field will be reviewed. While evidence for Ion Induced Nucleation is accumulating the exact mechanism is still not known and more research is required to understand and quantify the effect.

show abstract

Section: Ionsmentioning

confidence: 99%

The role of atmospheric ions in aerosol nucleation – a review

2008

View full text Add to dashboard Cite

show abstract

“…Chemical Ionization (CI) is a technique which has found application in many fields to measure inorganic and organic compounds (Jennings 1979;Harrison 1983;Arnold and Hauck 1985;Budzikiewicz 1986;Viggiano 1993;Huey et al 1995;Hansel et al 1998;Huey 2006;de Gouw and Warneke 2007). It is sensitive, with pptv or lower detection thresholds possible, and has a fast response limited ultimately by the reaction time in the ion-molecule region.…”

Section: Chemical Ionization Mass Spectrometry (Cims)mentioning

confidence: 99%

Particulate Organic Matter Detection Using a Micro-Orifice Volatilization Impactor Coupled to a Chemical Ionization Mass Spectrometer (MOVI-CIMS)

Yatavelli

Thornton

2010

Aerosol Science and Technology

View full text Add to dashboard Cite

We describe a new method, Micro-Orifice Volatilization Impactor-CIMS (MOVI-CIMS) that couples two well-proven techniques, inertial impaction and chemical ionization mass spectrometry (CIMS). This technique allows both gas and condensed-phase composition data to be obtained on a semi-continuous basis. Gasphase compounds are analyzed while particles are collected on a post. This collection step is followed by thermal desorption in an inert atmosphere to detect condensed-phase compounds. Differentiation between gas and condensed-phase compounds can likely occur on hourly or shorter timescales. The unique aspects of this approach are the use of an impactor with 100 nozzles that allows particle collection at a pressure within 15% of ambient and the ability to use a wide suite of negative and positive reagent ions. A sample flow rate of 10 L min −1 results in a cut-point diameter (d 50 , diameter of 50% collection efficiency) of 0.13 µm. We demonstrate the capabilities of this technique by applying it to the determination of mono-and dicarboxylic acid vapor pressures and studies of the heterogeneous oxidation of oleic acid aerosol particles.

show abstract

“…However, process (1) does not su$ciently account for why the s r is related to the PA as indicating the fact that s r s at n῎2 were much larger than those at n῎4 for X῎DMS, DMSO, and pyridine of high PAs, because s r for process (1) depended on the s col , which was not related to the PA. When coordination water molecule (s) were observed among the product ions at low E col , we had reason to believe that H ῌ X was produced by process (1). However, when no products were observed accompanied by coordination water molecule(s) as in the cases of X῎DMS, DMSO, and pyridine, then another possible process, i.e., direct proton transfer, may also have been involved: H (2) does account for the observation that s r was expedited when the target X had a greater PA than that of (H 2 O) n .…”

Section: Discussionmentioning

confidence: 99%

“…The water clusters react with various trace compounds that have a larger proton a$nity than that of water. 1) Even though the concentrations of such compounds are not high, it is known that they often play significant roles in the environment, e.g., the trace compounds contribute to ozone depletion and acid rain, and may accelerate nucleation in the atmosphere. 2) Studies of protonated water cluster reactions contribute to the general understanding of atmospheric chemistry.…”

Section: Introductionmentioning

confidence: 99%