Thermal Desorption/Tunable Vacuum–Ultraviolet Time-of-Flight Photoionization Aerosol Mass Spectrometry for Investigating Secondary Organic Aerosols in Chamber Experiments

Fang, Weihai; Gong, Lei; Shan, Xu; Liu, Fuyi; Wang, Zhenya; Sheng, Liusi

doi:10.1021/ac201838e

Cited by 34 publications

(35 citation statements)

References 82 publications

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“…Fang et al used VUV photoionisation in a single-particle aerosol time-of-flight mass spectrometer (ATOFMS) for characterisation of the composition of SOAs produced through photooxidation of toluene in a smog chamber. [48,49] Robinson et al [50] reported coupling of a softer ionisation source with an Aerodyne aerosol mass spectrometer (AMS). In that study, a metastable atom bombardment (MAB) ionisation source was incorporated so the system could be readily switched between MAB and traditionally used electron ionisation (EI).…”

Section: Online Ms Methodsmentioning

confidence: 99%

Mass spectrometric approaches for chemical characterisation of atmospheric aerosols: critical review of the most recent advances

Laskin¹,

Laskin²,

Nizkorodov³

2012

Environ. Chem.

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Environmental context. Atmospheric aerosols have profound effects on the environment through several physicochemical processes, such as absorption and scattering of sunlight, heterogeneous gas-particle reactions and adverse effects on the respiratory and cardiovascular systems. Understanding aerosol atmospheric chemistry and its environmental impact requires comprehensive characterisation of the physical and chemical properties of particles. Results from mass spectrometry provide important new insights into the origin of atmospheric aerosols, the evolution of their physicochemical properties, their reactivity and their effect on the environment.Abstract. This manuscript presents an overview of the most recent instrument developments for the field and laboratory applications of mass spectrometry (MS) to investigate the chemistry and physics of atmospheric aerosols. A range of MS instruments, employing different sample introduction methods, ionisation and mass detection techniques are used both for 'online' and 'offline' characterisation of aerosols. Online MS techniques enable detection of individual particles with simultaneous measurement of particle size distributions and aerodynamic characteristics and are ideally suited for field studies that require high temporal resolution. Offline MS techniques provide a means for detailed molecular-level analysis of aerosol samples, which is essential to gain fundamental knowledge regarding aerosol chemistry, mechanisms of particle formation and atmospheric aging. Combined, complementary MS techniques provide comprehensive information on the chemical composition, size, morphology and phase of aerosols -data of key importance for evaluating hygroscopic and optical properties of particles, their health effects, understanding their origins and atmospheric evolution. Over the last few years, developments and applications of MS techniques in aerosol research have expanded remarkably as evident by skyrocketing publication statistics. The goal of this review is to present the most recent developments in the field of aerosol mass spectrometry for the time period of late 2010 to early 2012, which have not been conveyed in previous reviews.

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Section: Online Ms Methodsmentioning

confidence: 99%

Mass spectrometric approaches for chemical characterisation of atmospheric aerosols: critical review of the most recent advances

Laskin¹,

Laskin²,

Nizkorodov³

2012

Environ. Chem.

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“…The mass spectra of R-(+) limonene obtained at different lower energies are also useful to analyze the products of SOA formed during the photooxidation and photodecomposition of limonene in the (environmental) smog chamber. [12,13] In order to understand the photoionization of these molecules, two photoionization processes should be considered:…”

Section: Introductionmentioning

confidence: 93%

“…Due to the importance of these molecules, an understanding of their mass spectra obtained by tunable vacuum ultraviolet (VUV) synchrotron radiation is required, as well as a need to investigate their basic properties such as ionization energy (IE), the appearance energies (E AE ) of the ions formed during fragmentation. The mass spectra of R‐(+) limonene obtained at different lower energies are also useful to analyze the products of SOA formed during the photooxidation and photodecomposition of limonene in the (environmental) smog chamber …”

Section: Introductionmentioning

confidence: 99%

Photoionization and dissociation of the monoterpene limonene: mass spectrometric and computational investigation

et al. 2011

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The photoionization of the monoterpene limonene has been studied using tunable vacuum ultraviolet synchrotron radiation in the region from the threshold for ionization of the parent molecule up to 15.5 eV. The adiabatic ionization energy of limonene is derived from photoionization efficiency spectrum and found to be 8.27 eV, compared with the density functional theory calculations which yields a value of 8.08 eV (B3LYP/6-311++G). Primary dissociation pathways of the parent molecule ions are investigated by experimental observations and theoretical calculations. Most of the fragmentation channels occur via a rearrangement reaction prior to dissociation. Transition structures and intermediates for those isomerization processes are also determined.

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“…Tunable VUV photoionisation reduces fragmentation of SOA constituents prior to analysis, which greatly simplifies the observed mass spectra. Using this technique, Fang et al conducted detailed characterisation of the composition of SOA produced through photooxidation of several VOCs in a smog chamber [133,134]. It has been demonstrated that accurate measurement of the ionisation energies of individual SOA constituents provides important structural information that is difficult to obtain using other techniques.…”

Section: Laser Desorption Ionisation Mass Spectrometrymentioning

confidence: 99%

New mass spectrometry techniques for studying physical chemistry of atmospheric heterogeneous processes

Laskin

Nizkorodov

2013

International Reviews in Physical Chemistry

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Ambient particles and droplets have a significant effect on climate, visibility and human health. Once formed, they undergo continuous transformations through condensation and evaporation of water, uptake of low-volatility organic molecules and photochemical reactions involving various gaseous and condensed-phase species in the atmosphere. These transformations determine the physical and chemical properties of airborne particles, such as their ability to absorb and scatter solar radiation and nucleate cloud droplets. The complexity, heterogeneity and size of ambient particles make it challenging to understand the kinetics and mechanisms of their formation and chemical transformations. Mass spectrometry (MS) is a powerful analytical technique that enables detailed chemical characterisation of both small and large molecules in complex matrices. This capability makes MS a promising tool for studying chemical transformations of particles and droplets in the atmosphere. This review is focused on new and emerging experimental MS-based approaches for understanding the kinetics and mechanisms of such transformations. Some of the techniques discussed herein are best suited for ambient samples, while the others work best in laboratory applications. However, in combination, they provide a comprehensive arsenal of methods for characterisation of particles and droplets. In addition, we emphasise the role of fundamental physical chemistry studies in the development of new methods for chemical analysis of ambient particles and droplets.

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Thermal Desorption/Tunable Vacuum–Ultraviolet Time-of-Flight Photoionization Aerosol Mass Spectrometry for Investigating Secondary Organic Aerosols in Chamber Experiments

Cited by 34 publications

References 82 publications

Mass spectrometric approaches for chemical characterisation of atmospheric aerosols: critical review of the most recent advances

Mass spectrometric approaches for chemical characterisation of atmospheric aerosols: critical review of the most recent advances

Photoionization and dissociation of the monoterpene limonene: mass spectrometric and computational investigation

New mass spectrometry techniques for studying physical chemistry of atmospheric heterogeneous processes

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