A Field Procedure for Determining Low Concentrations of Hydrazine.
Abstract
When the TLV for hydrazine exposure was lowered to 0.1 ppm, the only field approach for sampling and analysis that could be used with minimum difficulty involved bubbler sampling, with analysis by the paradimethylaminobenzaldehyde (PDAB) colorimeter method. This method presents problems to the wearer of the sampling system and has been validated only to 0.5 ppm by NIOSH. We have modified and extended the PDAB technique to analyze samples collected on a solid sorbent (acid-treated firebrick) rather than collected with a bubbler, and have shown the usefulness of the technique at exposure concentrations to 0.01 ppm and less during long-term sampling. Along with a change in sampling technique, field analysis was simplified by using a commercially available test kit and procedure for hydrazine in water. The method has been studied in the laboratory, and field analysis has been validated in a collaborative test involving analysis of preexposed sampling tubes by a number of participating bioenvironmental engineers and environmental health technicians. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1979
- Accession Number
- ADA081167
Entities
People
- Harry J. Suggs
- Herman J. Kilian
- Leonard J. Luskus
Organizations
- United States Air Force School of Aerospace Medicine