National Institute for Occupational Safety and Health

“ ESTIMATED LOD: 1 μg each analyte per sample PRECISION:
See EVALUATION OF METHOD.
APPLICABILITY: This method may be used to determine two or more of the specified analytes simultaneously.
INTERFERENCES: High humidity reduces sampling capacity. Less volatile compounds may displace more volatile compounds on the charcoal.
OTHER METHODS: This method combines and updates Methods 1401 and 1402, NMAM, Fourth Edition, Issue 2. Estimated LOD for each analyte is approximately ten times lower than that of the old methods. ”

“ Inject a known amount of stock solution directly onto front sorbent section with a microliter syringe. NIOSH Manual of Analytical Methods (NMAM) , Fourth Edition ALC OH OLS CO MB INED : MET HO D 140 5, Issue 1, dated 15 M arch 200 3 - Page 3 o f 6 c. Ca p the tube. Allow to stand overnight. d. Deso rb (steps 5 through 7 ) and analyze together with working standards (steps 11 and 12) . e. Prepare a graph of DE vs. μg analyte recovered. 10. Analyze three quality control bind spikes and three analyst spikes to insure that the calibration graph and D E graph are in control. ”

“ Carbon disulfide is toxic and an acute fire and explosion hazard (flash point = -30 °C) ; all work with it must be done in a hood. Propanol, hexane, and heptane are flamm able. Analytes should be han dled in a fume hood. ”