National Institute for Occupational Safety and Health

“ All of the desorption efficiency, recovery and storage studies have been performed with laboratory spiked sorbent tubes. Sampling was done with ORBO-42 Large sampling tubes, because the 10-mm OD allowed for a reduced pressure drop, which enabled 8-h samples to be collected at 2 L/min. Benzothiazole in the vapor state is adsorbed on the washed XAD-2 of the ORBO-42 Large sampling tube. However, samples taken during field ® studies where high particulate matter was present have shown some benzothiazole on the Teflon prefilters. ”

“ Forceps. 7. Syringes, 5-, 10-μL, other sizes if needed. 8. Volumetric flasks, 10-mL, 100-mL. 9. Aluminum foil. 10. Refrigerant packs. 11. ORBO-43 sampling tubes (Supelco) SPECIAL PRECAUTIONS: Hexane is highly flammable. Benzothiazole has an irritating odor and is highly toxic by ingestion. Handle in a well ventilated hood and wear protective clothing.
SAMPLING: 1. 2. 3. 4.
Calibrate each personal sampling pump with a representative sampler in line. Sample at an accurately known flow rate of 1.0 to 2.0 L/min for a total volume of 480 to 960 L. Pack securely for shipment in refrigerant packs. ”