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Title: Methods of analyzing composition of aerosol particles

Patent ·
OSTI ID:1083195

An aerosol particle analyzer includes a laser ablation chamber, a gas-filled conduit, and a mass spectrometer. The laser ablation chamber can be operated at a low pressure, which can be from 0.1 mTorr to 30 mTorr. The ablated ions are transferred into a gas-filled conduit. The gas-filled conduit reduces the electrical charge and the speed of ablated ions as they collide and mix with buffer gases in the gas-filled conduit. Preferably, the gas filled-conduit includes an electromagnetic multipole structure that collimates the nascent ions into a beam, which is guided into the mass spectrometer. Because the gas-filled conduit allows storage of vast quantities of the ions from the ablated particles, the ions from a single ablated particle can be analyzed multiple times and by a variety of techniques to supply statistically meaningful analysis of composition and isotope ratios.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-00OR22725
Assignee:
UT-Battelle, LLC (Oak Ridge, TN)
Patent Number(s):
8,373,119
Application Number:
13/561,365
OSTI ID:
1083195
Country of Publication:
United States
Language:
English

References (15)

Chemical Characterization of Individual, Airborne Sub-10-nm Particles and Molecules journal March 2006
Measurement of Individual Particle Atomic Composition by Aerosol Mass Spectrometry journal November 2001
Sensitive glow discharge ion source for aerosol and gas analysis patent August 2007
A Design Tool for Aerodynamic Lens Systems journal June 2006
Characterization of individual particle atomic composition by aerosol mass spectrometry patent August 2004
Method and apparatus for mass spectrometry analysis of aerosol particles at atmospheric pressure patent September 2005
Ultra high mass range mass spectrometer systems patent December 2005
High resolution mass spectrometry method and system for analysis of whole proteins and other large molecules patent March 2010
Simultaneous Elemental Composition and Size Distributions of Submicron Particles in Real Time Using Laser Atomization Ionization Mass Spectrometry journal July 2000
Mass spectrometer system including a double ion guide interface and method of operation patent February 2009
Sensitive Glow Discharge Ion Source for Aerosol and Gas Analysis patent-application February 2007
Laser ablation flowing atmospheric-pressure afterglow for ambient mass spectrometry patent-application November 2009
Determination of the Size Distribution of Polydisperse Nanoparticles with Single-Particle Mass Spectrometry: The Role of Ion Kinetic Energy journal February 2005
Transverse flow aerodynamic lens patent November 1991
Method for producing nanoparticles and nanostructured films patent-application December 2005

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