A Gas Dilution System For Methyl Bromide.
Scheide-EP; Hughes-EE; Taylor-JK
NIOSH 1973 Oct:11 pages
A system capable of producing well defined test atmospheres of methyl-bromide (74839) in air and an analytical system for the analysis of these gas mixtures was assessed. Using a bulk mixture of 1,000 parts per million (ppm), methyl-bromide in nitrogen, and accurately blending the mixture with a stream of clean, dry air, concentrations between 5 and 100ppm were produced. The precision of these analyses was very good, indicating that the analytical system and sampling technique were reliable. The system described was capable of producing well defined test atmospheres of varying concentration of methyl-bromide in nitrogen from a pressurized cylinder with a stream of diluent air. Analysis of the bulk mixture and the dilutions were easily performed by gas chromatography. The authors conclude that this gas generation system should provide a means of calibrating the various analytical systems for methyl- bromide now in use.
NIOSH-Author; Analytical-instruments; Air-quality-measurement; Laboratory-equipment; Research; Gas-chromatography; Laboratory-techniques; Monitors; Analytical-models; Vapors; Quantitative-analysis; Air-sampling;
Division of Laboratories and Criteria Development, NIOSH, U.S. Department of Health, Education, and Welfare, Cincinnati, Ohio, 11 pages, 1 reference