National Institute for Occupational Safety and Health

“ Add known amounts of calibration stock solution to carbon disulfide solvent in 10-m L volumetric flasks and dilute to the mark. b. Analyze together with samples and blank s (steps 11 and 12) . c. Prepare calibration graph (peak area vs. μg methyl acrylate) . 10. Determine the desorption efficiency (DE) at least once for each lot of Anasorb CMS used for sampling in the calibration range (ste p 9) . a. Prepare three tubes at each of five levels plus three media blanks. b. Inject a known amount of calibration stock solution directly onto the front sorbent section of each Anasorb CMS tube. ”

“ Carbon disulfide is toxic and flammable and should be handled in a well ventilated fume hood. Methyl acrylate reacts violently with strong oxidants resulting in an explosion and fire hazard. Methyl acrylate polymerizes easily under the effects of heat, light, and peroxides.
SAMPLING: 1. Calibrate each personal sampling pump with a representative sample tube in line. 2. Break open the ends of the sample tube immediately prior to sampling. Attach sample tube to personal sampling pump with flexible tubing. 3. ”

“ Prepare a graph o f DE vs. μg methyl acrylate recovered.
MEASUREMENT: 11. Set gas chromatograph according to manufacturer’s recommendations and to conditions given on page 2552-1. Inject a 1-μL sample aliquot manually using the solvent flush technique or with an auto sampler. NOTE: If peak area is above the linear range of the working standards, dilute with carbon disulfide solvent, reanalyze and apply the appropriate dilution factor in the calculations. 12. Measure peak areas. ”