Near Real-Time, Microchip Assay of Aerosol Chemical Composition, Phase I

Metadata Updated: May 2, 2019

A compact, autonomous and rugged instrument to measure the concentration of inorganic ions, and possibly organic acids, in atmospheric aerosols is proposed. This instrument will combine an innovative method for particle concentration and collection with emerging ?laboratory on a chip? analytical methods. The analytical microchip, measuring a few centimeters across, will contain all of the critical components for chemical quantitation, including the collection reservoir, capillary electrophoresis separation column and conductivity detector. Atmospheric aerosol will be deposited directly on the analytical chip using a new, thermally diffusive, laminar flow, water condensation technology that enlarges nanometer diameter particles into the micrometer size range. Transfer from the collection reservoir to the separation channel will be accomplished electrodynamically. Within the column, ions are separated by electrophoresis, and detected by conductivity. Cations and anions will be determined quantitatively. Subsequent work could expand this approach to organic acids. This instrument is in direct response to NASA solicitation for ?systems and devices for measurement of atmospheric aerosol chemical.. properties?. It further fits the stated desire for ?autonomy.. for ground-station network applications and deployment aboard aircraft.? The system will be automated, yielding continuous, 5-min data at global background concentrations.

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Public: This dataset is intended for public access and use. License: U.S. Government Work

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Metadata Created Date August 1, 2018
Metadata Updated Date May 2, 2019

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date May 2, 2019
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_5398
Maintainer Email
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Datagov Dedupe Retained 20190501230127
Harvest Object Id 1a9de4b1-fa6a-427a-bd23-f1910e6fc7f7
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2004-07-01
Homepage URL
Data Last Modified 2018-07-19
Program Code 026:027
Source Datajson Identifier True
Source Hash f5f5852d98fd71c587e68998235de0886c0453d8
Source Schema Version 1.1

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