National Institute for Occupational Safety and Health

“ Carbon disulfide is toxic and an acute fire and explosion hazard (flash point = -30 °C) ; all work with it must be done in a hood.
SAMPLING: 1. 2. 3. 4.
Calibrate each personal sampling pump with a representative sampler in line. Break the ends of the sampler immediately before sampling. Attach sampler to personal sampling pump with flexible tubing. Sample at an accurately known flow rate between 0.01 and 0.2 L/min for a total sample size of 0.1 to 1 L (ethanol) , 0.3 to 3 L (isopropyl alcohol) or 1.0 to 10 L (t-butyl alcohol) . ”

“ The working ranges are 16 to 1000 ppm ethanol (30 to 1900 mg/m 3) for a 1-L air sample; 4 to 400 ppm isopropyl alcohol (10 to 1000 mg/m 3) for a 3-L air sample; and 1 to 100 ppm t-butyl alcohol (3 to 300 mg/m 3) for a 10-L air sample. This method employs a simple desorption and may be used to determine two or more analytes simultaneously by varying GC conditions (e.g., temperature programming) .
INTERFERENCES: High humidity reduces sampling efficiency. The methods were validated using a 3 m x 3-mm stainless steel column packed with 10% FFAP on Chromosorb W-AW ”

“ Inject sample aliquot manually using solvent flush technique or with autosampler. NOTE: If peak area is above the linear range of the working standards, dilute with eluent, reanalyze and apply the appropriate dilution factor in calculations. Measure peak area. Divide the peak area of analyte by the peak area of internal standard on the same chromatogram. ”