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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:
ORNL (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 (5)

Chemical Characterization of Individual, Airborne Sub-10-nm Particles and Molecules journal March 2006
Determination of the Size Distribution of Polydisperse Nanoparticles with Single-Particle Mass Spectrometry: The Role of Ion Kinetic Energy journal February 2005
A Design Tool for Aerodynamic Lens Systems journal June 2006
Measurement of Individual Particle Atomic Composition by Aerosol Mass Spectrometry journal November 2001
Simultaneous Elemental Composition and Size Distributions of Submicron Particles in Real Time Using Laser Atomization Ionization Mass Spectrometry journal July 2000

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