Material Compatability with Threshold Limit Value Levels of Monomethyl Hydrazine
Abstract
Materials were evaluated for potential use as ambient air sample lines for hydrazines. Fluorinated polymers performed the best, metals the worst. Various sample lengths were investigated: increasing the length enhance the differences between samples, although the ranking of performance remained essentially unchanged. The effects of internal diameter (id) upon transport ability was evaluated by testing samples with ids of 3/16, 1/4, and 3/8 inch. The 3/8 inch id tubing consistently transported a larger percentage of the contaminant. Additional areas examined for their effects on performance were: temperature, humidity, joining of segments, pushing the pulling of the gas stream, and conditioning of the sample tube. The only variable found to have a significant effect on the results was conditioning; indicating that all new tubing should be thoroughly rinsed prior to use as well as periodically between sampling to remove ambient contaminants. Keywords: Threshold limit value; Monomethyl hydrazine; Air pollution; Vapor detection.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 26, 1988
- Accession Number
- ADA200294
Entities
People
- J. R. Wyat
- P. A. Taffe
- S. L. Rose-pehrsson
Organizations
- United States Naval Research Laboratory