National Institute for Occupational Safety and Health

“ Prepare working standards (12 to 1000 μg/mL aqueous methanol) by adding appropriate aliquots of calibration stock solution to 50% methanol. Follow neutralization procedure in step 9. Analyze working standards together with samples and blanks (steps 14 through 16) . Prepare a calibration graph of area vs. μg of n-butylamine. Determine recovery for each lot of silica gel used for sampling in the concentration range of interest. Prepare four silica gel tubes at each of five levels plus three media blanks. ”

“ Butylamine vapor can cause irritation to the eyes, nose, and throat. Inhalation can cause headache and flushing of skin. Contact with the liquid may produce severe injury to eyes and skin [4] . Potassium hydroxide is a strong caustic, corrosive to tissue. Handle with gloves. Work in a hood.
SAMPLING: 1. 2. 3. 4. 5. 6.
Calibrate each personal sampling pump with a representative sampler in line. Break the ends of the silica gel tube immediately prior to sampling. Attach outlet of tube to the sampling pump with flexible tubing. ”

“ The temperature, pressure, and relative humidity of the atmosphere being sampled should be recorded. Cap and seal the sample tube for shipment and place in a suitable container in order to prevent damage during transit. ”