National Institute for Occupational Safety and Health

“ Carbon disulfide is toxic and an extreme fire and explosion hazard (flash point = -30 °C) . Ethyl chloride is a narcotic and toxic [3] . Work with these only in a hood and away from spark sources. 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 0.02 and 0.05 L/min for a total sample size of 0.3 to 3 L. Separate the front and back tubes immediately after sampling. ”

“ Weigh media blank front tube and caps. b. Inject ethyl chloride slowly and directly onto a media blank front sorbent section with a gas-tight syringe. c. Immediately cap the tube. Reweigh the tube. Calculate the mass of ethyl chloride added. ”

“ Air, filtered, compressed.
See SPECIAL PRECAUTIONS.
1. Sampler: two glass tubes connected in series with a short piece of plastic tubing; each tube 10 cm long, 8 mm OD, 6 mm ID, containing 20/40 mesh activated (600 °C) coconut shell charcoal (front tube = 400 mg; back tube = 200 mg) . A plug of silylated glass wool is placed at each end of each tube. Four plastic caps are required for sealing the tubes after use. Pressure drop across sampler less than 3.4 kPa (2.5 cm Hg) at 1 L/min airflow. 2. Personal sampling pump, 0.02 to 0.05 L/min, with flexible connecting tubing. 3. ”