The United States of America As Represented by the Administrator of the U.S. Environmental Protection Agency

Shawn P Ryan

Brian K Gullett

William C Squier

Sang Don Lee

Abderrahamne Touati

Emily G Snyder

A method and apparatus for generating a standardized surface contaminated by an aerosol deposited on its surface is described. Aerosols are propelled horizontally onto a vertical surface. The standardized contaminated surface is used to evaluate the effectiveness of cleaning and removing techniques.

Aerosol particle deposition on surfaces

For analysis of small quatities of target analytes in an environment, the gas flow can be delivered to a suitably fast analyzer and their concentration determined in a time period whose duration is dependent on the analyte, its concentration and the phase separation properties. A device having a sorbent bed that is essentially concentric with a passage way containing thermal fluid is used to concentrate the target analyte.

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Durham, NC, United States of America

Shawn P Ryan