National Institute for Occupational Safety and Health

“ Ethyl bromide is flammable, a dangerous fire hazard (flash point = 26 °C) , respiratory irritant, narcotic, and a hepato- and renal toxin [4] . 2-Propanol is flammable and a dangerous fire risk with a flash point of 11 °C. SAMPLING: 1. 2. 3. 4.
Calibrate each personal sampling pump with a representative sampler in line. Break the ends of the sampler immediately before sampling. Attach sampler to personal sampling pump with flexible tubing. Sample at an accurately known flow rate between 0.01 and 0.2 L/min for a total sample size of 0.5 to 4 L. Cap the samplers. Pack securely for shipment. ”

“ Prepare calibration graph (peak area vs. mg ethyl bromide) . Determine desorption efficiency (DE) at least once for each lot of charcoal used for sampling in the calibration range (step 8) . Prepare three tubes at each of five levels plus three media blanks. a. Remove and discard back sorbent section of a media blank sampler. b. Inject a known amount (1 to 20 μL) of ethyl bromide or calibration stock solution directly onto front sorbent section with a microliter syringe. c. Cap the tube. Allow to stand overnight. d. ”

“ Documentation of the NIOSH Validation Tests, U.S. Department of Health, Education, and Welfare, Publ. (NIOSH) 77-185 (1977) , available as GPO Stock #017-033-00231-2 from Superintendent of Documents, Washington, DC 20402. [2] User check, UBTL, Inc., NIOSH Sequence #4585-K (NIOSH, unpublished, October 31, 1984) . [3] NIOSH Manual of Analytical Methods, 2nd ed., Vol. ”