Volatility-resolved chemical characterization of airborne particles
Abstract
A method and apparatus for evaluating the chemical composition of airborne particles by sequentially collecting and analyzing airborne particles in-situ. The method includes: collecting particles; enlarging the particles through water condensation; accelerating the enlarged particles onto a surface to collect enlarged particles; and analyzing the enlarged particles by: isolating the surface; passing a carrier gas over the surface; heating the surface to thermally desorb collected particles into the carrier gas; transporting this evolved vapor into detectors; and assaying the evolved vapor as a function of a desorption temperature. The apparatus includes: a sample flow inlet; a condensational growth tube; a collection and thermal desorption (CTD) cell; a carrier gas source; a heater coupled to the CTD; one or more gas detectors; and a controller configured to operate valves, the heater, the growth tube, and the CTD cell in at least an in-situ sequential collection mode and analysis mode.
- Inventors:
- Issue Date:
- Research Org.:
- Aerosol Dynamics, Inc., Berkeley, CA (United States); Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Office of SBIR/STTR Programs (SBIR/STTR)
- OSTI Identifier:
- 2222208
- Patent Number(s):
- 11733148
- Application Number:
- 16/775,033
- Assignee:
- Aerosol Dynamics Inc. (Berkeley, CA); Virginia Tech Intellectual Properties, Inc. (Blacksburg, VA)
- DOE Contract Number:
- SC0018462
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 01/28/2020
- Country of Publication:
- United States
- Language:
- English
Citation Formats
Isaacman-VanWertz, Gabriel, Kreisberg, Nathan M., and Hering, Susanne V. Volatility-resolved chemical characterization of airborne particles. United States: N. p., 2023.
Web.
Isaacman-VanWertz, Gabriel, Kreisberg, Nathan M., & Hering, Susanne V. Volatility-resolved chemical characterization of airborne particles. United States.
Isaacman-VanWertz, Gabriel, Kreisberg, Nathan M., and Hering, Susanne V. Tue .
"Volatility-resolved chemical characterization of airborne particles". United States. https://www.osti.gov/servlets/purl/2222208.
@article{osti_2222208,
title = {Volatility-resolved chemical characterization of airborne particles},
author = {Isaacman-VanWertz, Gabriel and Kreisberg, Nathan M. and Hering, Susanne V.},
abstractNote = {A method and apparatus for evaluating the chemical composition of airborne particles by sequentially collecting and analyzing airborne particles in-situ. The method includes: collecting particles; enlarging the particles through water condensation; accelerating the enlarged particles onto a surface to collect enlarged particles; and analyzing the enlarged particles by: isolating the surface; passing a carrier gas over the surface; heating the surface to thermally desorb collected particles into the carrier gas; transporting this evolved vapor into detectors; and assaying the evolved vapor as a function of a desorption temperature. The apparatus includes: a sample flow inlet; a condensational growth tube; a collection and thermal desorption (CTD) cell; a carrier gas source; a heater coupled to the CTD; one or more gas detectors; and a controller configured to operate valves, the heater, the growth tube, and the CTD cell in at least an in-situ sequential collection mode and analysis mode.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2023},
month = {8}
}
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