National Institute for Occupational Safety and Health

“ Prepare calibration graph (peak area vs. μg acrylonitrile) . NOTE: Compare the peak areas of the working standards with a 0.1 mg/mL reference standard prepared from stabilized (undistilled) acrylonitrile in hexane. When the concentration of the working standards starts to decrease, prepare new working standards. 9. Determine desorption efficiency (DE) at least once for each batch of charcoal used for sampling in the calibration range (step 8) . ”

“ Carbon disulfide is toxic and a severe fire and explosion hazard (flash point = -30 °C) . Acrylonitrile is explosive, flammable, toxic, and a suspect carcinogen [3] . Work with these compounds only in a hood. 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 3.5 to 20 L. Cap the samplers pack securely for shipment. ”

“ Sampler: glass tube, 7 cm long, 6-mm OD, 4mm ID, flame-sealed ends with plastic caps, containing two sections of activated (600 °C) coconut shell charcoal (front = 100 mg, back = 50 mg) separated by a 2-mm urethane foam plug. ”