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Sampling and Analysis of Air Contaminants - Peracetic Acid Vapor, Tear Gas and Pepper Spray, and Diffusive Samplers for Vapor Intrusion and IAQ (AIHce EXP 2019 OnDemand)



Course Description:
Recorded at AIHce EXP 2019

Sampling and analysis of air contaminants in occupational environments is complex. Techniques need to be developed and validated when trying to monitor reactive gases or air contaminants at low concentrations for sampling durations of days to weeks. Three presentations will cover: 1) a novel sampling method for peracetic acid based on the chemical reaction with an alkene to form an epoxide. By utilizing a reaction specific to peracids, hydrogen peroxide is not an interferent; 2) the analysis of tear gas (CN & CS) and pepper spray for clearance and reoccupation of homes and businesses. Young children and the immunocompromised can experience problems with low level exposures. The discussion will show how to sample for tear gas and how to evaluate the data; and 3) the use of diffusive samplers for vapor intrusion (VI) studies and indoor air quality (IAQ) investigations. Because sensitive sampling and analytical methods are desirable, diffusive samplers are not considered sometimes due to their lower sampling rates. Vapor intrusion and IAQ studies consider a longer exposure duration (e.g., days, weeks, or months) than workplace sampling. Therefore, diffusive samplers are recommended due their robust reliability and adequate detection limits for long-duration sampling. The session is sponsored by the Sampling and Laboratory Analysis Committee.

Contact Hours:
1

Presentation Date:
05/22/2019

Presenters:
Stephen Jackson, National Institute for Occupational Safety and Health
Charles Manning, Assay Technology.