Mass Spectrometric Methods for Arosol Composition Masurements

Coe, Hugh; Allan, J. D.

doi:10.1002/9780470988510.ch6

Cited by 9 publications

(7 citation statements)

References 169 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Around the mid-90s, the field of on-line aerosol mass spectrometry began to emerge as a method for on-line composition analysis of atmospheric aerosols (Coe and Allan, 2006;Hinz and Spengler, 2007;Suess and Prather, 1999). Applications of aerosol mass spectrometry in aerosol studies have increased considerably during recent years, and the technique has provided new information on aerosol formation, composition and reactions with high time resolution (e.g.…”

Section: On-line Characterization Of Aerosol Chemical Compositionmentioning

confidence: 99%

Measuring atmospheric composition change

Laj

Klausen

Bilde

et al. 2009

Atmospheric Environment

162

117

View full text Add to dashboard Cite

Scientific findings from the last decades have clearly highlighted the need for a more comprehensive approach to atmospheric change processes. In fact, observation of atmospheric composition variables has been an important activity of atmospheric research that has developed instrumental tools (advanced analytical techniques) and platforms (instrumented passenger aircrafts, ground-based in situ and remote sensing stations, earth observation satellite instruments) providing essential information on the composition of the atmosphere. The variability of the atmospheric system and the extreme complexity of the atmospheric cycles for short-lived gaseous and aerosol species have led to the development of complex models to interpret observations, test our theoretical understanding of atmospheric chemistry and predict future atmospheric composition. The validation of numerical models requires accurate information concerning the variability of atmospheric composition for targeted species via comparison with observations and measurements. In this paper, we provide an overview of recent advances in instrumentation and methodologies for measuring atmospheric composition changes from space, aircraft and the surface as well as recent improvements in laboratory techniques that permitted scientific advance in the field of atmospheric chemistry. Emphasis is given to the most promising and innovative technologies that will become operational in the near future to improve knowledge of atmospheric composition. Our current observation capacity, however, is not satisfactory to understand and predict future atmospheric composition changes, in relation to predicted climate warming. Based on the limitation of the current European observing system, we address the major gaps in a second part of the paper to explain why further developments in current observation strategies are still needed to strengthen and optimise an observing system not only capable of responding to the requirements of atmospheric services but also to newly open scientific questions

show abstract

Section: On-line Characterization Of Aerosol Chemical Compositionmentioning

confidence: 99%

Measuring atmospheric composition change

Laj

Klausen

Bilde

et al. 2009

Atmospheric Environment

162

117

View full text Add to dashboard Cite

show abstract

“…Over a dozen different laser ionization single particle mass spectrometers have been built. Earlier and recent reviews (Johnston, 2000;Noble & Prather, 2000;Sullivan & Prather, 2005;Coe & Allan, 2006) have covered many of the features of these instruments as well as some of their applications to measuring aerosol particles in the atmosphere. This review takes a different approach, providing insight into the design choices made by various groups operating single particle mass spectro-meters along with some of the author's personal experience in the design of these instruments.…”

Section: Introductionmentioning

confidence: 99%

The design of single particle laser mass spectrometers

Murphy

2006

Mass Spectrometry Reviews

209

249

View full text Add to dashboard Cite

This review explores some of the design choices made with single particle mass spectrometers. Different instruments have used various configurations of inlets, particle sizing techniques, ionization lasers, mass spectrometers, and other components. Systematic bias against non-spherical particles probably exceeds a factor of 2 for all instruments. An ionization laser tradeoff is the relatively poor beam quality and reliability of an excimer laser versus the longer wavelengths and slower response time of an Nd-YAG laser. Single particle instruments can make special demands on the speed and dynamic range of the mass spectrometers. This review explains some of the choices made for instruments that were developed for different types of measurements in the atmosphere. Some practical design notes are also given from the author's experience with each section of the instrument.

show abstract

“…These instruments have been the subject of several previous review papers. [8][9][10][11] Among the salient advances, SPMSs allowed for analysis of small aerosol masses (~10 -15 g), differentiation of internally mixed component properties from refractory (e.g. mineral dust) to volatile (e.g.…”

mentioning

confidence: 99%

Single-Particle Time-of-Flight Mass Spectrometry Utilizing a Femtosecond Desorption and Ionization Laser

Zawadowicz¹,

Abdelmonem

Mohr

et al. 2015

Anal. Chem.

View full text Add to dashboard Cite

Single-particle time-of-flight mass spectrometry has now been used since the 1990s to determine particle-to-particle variability and internal mixing state. Instruments commonly use 193 nm excimer or 266 nm frequency-quadrupled Nd:YAG lasers to ablate and ionize particles in a single step. We describe the use of a femtosecond laser system (800 nm wavelength, 100 fs pulse duration) in combination with an existing single-particle time-of-flight mass spectrometer. The goal of this project was to determine the suitability of a femtosecond laser for single-particle studies via direct comparison to the excimer laser (193 nm wavelength, ∼10 ns pulse duration) usually used with the instrument. Laser power, frequency, and polarization were varied to determine the effect on mass spectra. Atmospherically relevant materials that are often used in laboratory studies, ammonium nitrate and sodium chloride, were used for the aerosol. Detection of trace amounts of a heavy metal, lead, in an ammonium nitrate matrix was also investigated. The femtosecond ionization had a large air background not present with the 193 nm excimer and produced more multiply charged ions. Overall, we find that femtosecond laser ablation and ionization of aerosol particles is not radically different than that provided by a 193 nm excimer.

show abstract

Mass Spectrometric Methods for Arosol Composition Masurements

Cited by 9 publications

References 169 publications

Measuring atmospheric composition change

Measuring atmospheric composition change

The design of single particle laser mass spectrometers

Single-Particle Time-of-Flight Mass Spectrometry Utilizing a Femtosecond Desorption and Ionization Laser

Contact Info

Product

Resources

About