National Institute for Occupational Safety and Health

“ Prepare calibration graph (phenyl glycidyl ether peak area vs. mg phenyl glycidyl ether per 0.5 mL) . Determine desorption efficiency (DE) at least once for each lot of charcoal used for sampling in the range of interest. Prepare three tubes at each of five levels plus three medial blanks. a. Remove and discard back sorbent section of a media blank sampler. b. Inject known amount (1 to 20 μL) of phenyl glycidyl ether or standard solution of phenyl glycidyl ether in CS 2 directly onto front sorbent section with a microliter syringe. c. Cap the tube. Allow to stand overnight. ”

“ A silanized glass wool plug held in place with a metal spring precedes the front section and a urethane foam plug follows the back section. Pressure drop across the tube at 1.0 L/min air flow must be less than 3.4 kPa. Tubes are commercially available. 2. Personal sampling pump, 0.01 to 1 L/min, with flexible connecting tubing. ”

“ Sampler: borosilicate tubes, 7.0 cm long, 6mm OD, 4-mm ID; flame-sealed ends with plastic caps, containing two sections of 20/40 mesh activated (600 °C) coconut charcoal (front = 100 mg; back = 50 mg) separated by a urethane foam plug. ”