National Institute for Occupational Safety and Health

“ The working range for propylene glycol monomethyl ether was 0.041 to 10.0 ppm (0.154 to 36.9 mg/m3 ) , for dipropylene glycol monomethyl ether was 0.050 to 6.19 ppm (0.305 to 37.5 mg/m3 ) , and propylene glycol monomethyl ether acetate was 0.030 to 6.83 ppm (0.151 to 36.9 mg/m3 ) for a 10 L sample . Other methods used for the collection of these analytes used a different solid sorbent and were evaluated at higher analyte concentrations [1,2] . Collection and DE recovery at levels greater than the working range listed should be equal or better than those achieved using charcoal sorbent tubes. ”

“ Attach sampler to personal sampling pump with flexible tubing. 3. Sam ple at an accurately known flow rate between 0.1 and 0.2 L/min for a total sample size of 10 L. 4. Cap the samplers with plastic (not rubber) caps and pack securely for shipment. Samples should be kept cold.
SAMPLE PREPARATION: 5. Place the front and back sorbent sections of the sampler tube in separate vials. Place the glass wool preceding the front section into the vial containing the front section. Discard the remaining foam plugs. 6. Ad d 1.0 m L of the desorbing solution into each vial. ”