Real time infrared aerosol analyzer

Patent · Mon Jan 01 04:00:00 EST 1990

OSTI ID:867461

Johnson, Stanley A ^[1]; Reedy, Gerald T ^[2]; Kumar, Romesh ^[3]

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1. Countryside, IL
2. Bourbonnais, IL
3. Naperville, IL

Apparatus for analyzing aerosols in essentially real time includes a virtual impactor which separates coarse particles from fine and ultrafine particles in an aerosol sample. The coarse and ultrafine particles are captured in PTFE filters, and the fine particles impact onto an internal light reflection element. The composition and quantity of the particles on the PTFE filter and on the internal reflection element are measured by alternately passing infrared light through the filter and the internal light reflection element, and analyzing the light through infrared spectrophotometry to identify the particles in the sample.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4942297
• OSTI ID: 867461
• Country of Publication: United States
• Language: English

Related Subjects

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aerosol
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coarse
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composition
element
essentially
filter
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fine
fine particle
fine particles
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impactor
infrared
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internal
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ultrafine
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