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Book The Analysis of Aerosol Time of flight Mass Spectrometry Data

Download or read book The Analysis of Aerosol Time of flight Mass Spectrometry Data written by David Philip Fergenson and published by . This book was released on 2001 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Using Aerosol Time of flight Mass Spectrometry ATOFMS Data to Gain New Insights Into the Temporal Profiles Composition and Evolution of Individual Particles in the Troposphere

Download or read book Using Aerosol Time of flight Mass Spectrometry ATOFMS Data to Gain New Insights Into the Temporal Profiles Composition and Evolution of Individual Particles in the Troposphere written by Don-Yuan Liu and published by . This book was released on 2000 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Aerosol Time of flight Mass Spectrometry ATOFMS as a Real time Monitor of Individual Aerosol Particles in Field Studies

Download or read book Aerosol Time of flight Mass Spectrometry ATOFMS as a Real time Monitor of Individual Aerosol Particles in Field Studies written by Kimberly A. Prather and published by . This book was released on 2001 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Analysis of Atmospheric Aerosol Processes Using Single Particle Mass Spectrometry

Download or read book Analysis of Atmospheric Aerosol Processes Using Single Particle Mass Spectrometry written by Jeffrey Robert Whiteaker and published by . This book was released on 2002 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Analysis Concepts Of Aerosols by On Line Aerosol Mass Spectrometry

Download or read book Analysis Concepts Of Aerosols by On Line Aerosol Mass Spectrometry written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: It is known that aerosols have an impact on climate, air quality and health. To better characterize these effects, the knowledge of the aerosol particle properties, such as size and chemical composition, at the individual level is needed. Toward this purpose, a Single Particle Aerosol Laser Mass Spectrometer (SPALMS) has been designed and developed to characterize in details the organic fraction of particles. The instrument samples the aerosol with a nozzle system and sizes particles individually by laser velocimetry. The single particle constituents are then volatilized (desorption) and ionized (ionization) by laser. The resulting cations and anions are analyzed with a bipolar time-of-flight mass spectrometer. The resulting mass spectra provide a "fingerprint" of the particle composition. Thus the SPALMS instrument evaluates the mixing state, external versus internal, of the aerosol and allows the investigation of the chemical composition size dependency of the particles. The desorption and ionization steps are critical to obtain a good qualitative chemical analysis of the particle. Indeed many processes take place during these steps which fragment and alter the initial molecules in the particle. The simultaneous desorption and ionization with a single laser (337 nm) combined with a bipolar mass spectrometer is well suited for the analysis of mineral particles. On the other hand, organics in particles are better analyzed by operating first the constituents desorption with an infra-red laser (10.6 micrometers) and then the ionization shortly after with an ultra-violet laser (248 nm). Indeed molecules are softly ionized via a SPI or REMPI process. In this manner the resulting mass spectra are more representative of the particle composition since organics are less fragmented. As the SPALMS instrument involves many different measurement steps based of very different principles, it is equipped with many data acquisition devices (up to 12 channels) to record the correspo.

Book Further Development and Application of Laser Desorption Ionization LDI Using Aerosol Time of flight Mass Spectrometry ATOFMS

Download or read book Further Development and Application of Laser Desorption Ionization LDI Using Aerosol Time of flight Mass Spectrometry ATOFMS written by Ryan Jay Wenzel and published by . This book was released on 2004 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book New Insights Into Single particle Mixing State Using Aircraft Aerosol Time of flight Mass Spectrometry

Download or read book New Insights Into Single particle Mixing State Using Aircraft Aerosol Time of flight Mass Spectrometry written by Kerri Anne Pratt and published by . This book was released on 2009 with total page 387 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atmospheric aerosols strongly influence the energy balance of the Earth and the hydrological cycle by scattering and absorbing radiation and acting as cloud condensation and ice nuclei. The climate and human health impacts of aerosols are strongly dependent on particle size, chemical composition, and mixing state. During transport in the atmosphere, aerosol particles undergo physical and chemical transformations (atmospheric aging) through heterogeneous reactions with trace gases and gas-particle partitioning of semivolatile species. The size-resolved chemical composition of individual particles may be examined in real-time using aerosol time-of-flight mass spectrometry (ATOFMS). A smaller ATOFMS with increased data acquisition capabilities was developed for aircraft-based studies. Particle volatility was examined through ground-based measurements during the Study of Organic Aerosols in Riverside, CA (SOAR), and vertical mixing state profiles and cloud residues were examined through flight-based measurements during the Ice in Clouds Experiment - Layer Clouds (ICE-L). An automated thermodenuder (TD) was coupled to the aircraft (A)-ATOFMS to provide the first real-time, individual-particle size and volatility-resolved chemical composition measurements. This work provided insight into the volatility of secondary species, as well as the sources and chemistry of ambient particle cores. Seasonal differences in the volatility of amine species were attributed to the formation of aminium sulfate and nitrate salts in the summer. Oligomeric species were detected in real-time for the first time in individual ambient aerosol particles; increased oligomer ion intensities were associated with increased particle acidity and heating. During ICE-L, vertical profiles of particle types, such as soot, mixed with secondary species, such as sulfuric acid, were examined. For cloud sampling, a counterflow virtual impactor was utilized in series with the A-ATOFMS to examine the residues of cloud droplets and ice crystals. This resulted in the first in-situ detection of biological particles in high altitude ice clouds influenced by long-range transported dust. Playa salts were observed to serve as cloud condensation nuclei and were preferentially observed as residues of large droplets.

Book Characterization of Aerosol Particles Containing Sulfur and Nitrogen Species Using Aerosol Time of flight Mass Spectrometry ATOFMS

Download or read book Characterization of Aerosol Particles Containing Sulfur and Nitrogen Species Using Aerosol Time of flight Mass Spectrometry ATOFMS written by Kimberly Louise Salt and published by . This book was released on 1995 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Time of Flight Mass Spectrometry and its Applications

Download or read book Time of Flight Mass Spectrometry and its Applications written by E.W. Schlag and published by Newnes. This book was released on 2012-12-02 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: The resurgence of time-of-flight mass spectrometry (TOF-MS) has had its origin in the simplicity of construction and application of such instruments together with the high transmission and the great increase in resolution that has been achieved. The instrument lends itself naturally to a coupling with pulsed laser sources, though this is not a prerequisite. It also affords a time resolution far beyond that traditionally achieved with mass spectrometric rapid scan techniques - a recent example being the real-time analysis of a multi-component mixture from an automobile exhaust. Furthermore, the mass range appears to be extremely large: mass up to 500 kDa and beyond what is being readily measured in the laboratory today. The present set of contributions attempts to give a survey of current applications from many of the active groups in the field. A variety of new applications are considered which are no doubt just the beginning of large new areas of application. By presenting this work in book form it is hoped that it will be of help to the many groups intending to initiate work in this rapidly expanding new area of mass spectrometry.

Book Single Particle Perspective on the Southern California Ozone Study

Download or read book Single Particle Perspective on the Southern California Ozone Study written by Sylvia Harriet Pastor and published by . This book was released on 2003 with total page 1244 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Chemistry of the Upper and Lower Atmosphere

Download or read book Chemistry of the Upper and Lower Atmosphere written by Barbara J. Finlayson-Pitts and published by Elsevier. This book was released on 1999-11-17 with total page 993 pages. Available in PDF, EPUB and Kindle. Book excerpt: Here is the most comprehensive and up-to-date treatment of one of the hottest areas of chemical research. The treatment of fundamental kinetics and photochemistry will be highly useful to chemistry students and their instructors at the graduate level, as well as postdoctoral fellows entering this new, exciting, and well-funded field with a Ph.D. in a related discipline (e.g., analytical, organic, or physical chemistry, chemical physics, etc.). Chemistry of the Upper and Lower Atmosphere provides postgraduate researchers and teachers with a uniquely detailed, comprehensive, and authoritative resource. The text bridges the "gap" between the fundamental chemistry of the earth's atmosphere and "real world" examples of its application to the development of sound scientific risk assessments and associated risk management control strategies for both tropospheric and stratospheric pollutants. Serves as a graduate textbook and "must have" reference for all atmospheric scientists Provides more than 5000 references to the literature through the end of 1998 Presents tables of new actinic flux data for the troposphere and stratospher (0-40km) Summarizes kinetic and photochemical date for the troposphere and stratosphere Features problems at the end of most chapters to enhance the book's use in teaching Includes applications of the OZIPR box model with comprehensive chemistry for student use

Book Source Profiling and Apportionment of Airborne Particles

Download or read book Source Profiling and Apportionment of Airborne Particles written by Philip Joseph Silva and published by . This book was released on 2000 with total page 904 pages. Available in PDF, EPUB and Kindle. Book excerpt: