National Institute for Occupational Safety and Health

“ Vinyl acetate that is not stabilized or has been depleted of inhibitor can polymerize. Any substance collected with the vinyl acetate that is capable of reacting with it is a potential interference. Acids, bases, free radical initiators, etc., are capable of reacting with vinyl acetate during and after air sampling. ”

“ Vinyl acetate can irritate the eyes, nose, and throat. Vinyl Acetate is flammable in air (percent by volume) : lower, 2.6%; upper, 13.4%. [8] Vinyl acetate can become unstable if the polymerization inhibitor decreases to unsafe levels. [8] Methanol is flammable and a dangerous fire and explosion risk. It is moderately toxic by ingestion and inhalation. Wear appropriate protective clothing and work with these compounds in a well-ventilated hood. SAMPLING: 1.
Calibrate each personal sampling pump with a representative sampler in line. ”

“ Determine desorption efficiency (DE) at least once for each lot of sorbent used for sampling in the range of interest (step 8) . Prepare three tubes at each of five levels plus three media blanks. a. Remove and discard back sorbent section of a media blank sampler. b. Inject a known amount (2 to 20 μL) of a standard mixture of vinyl acetate directly onto front sorbent section with a microliter syringe. NOTE:
Inject no more than 20 μL onto the sorbent. Dilute stock solution as appropriate. c. Cap the tube. Allow to stand overnight. d. ”