National Institute for Occupational Safety and Health

“ This method includes: lower LOD/LOQ values for each analyte, improved DE recovery results for each analyte (at lower levels) , inclusion of methyl ethyl ketone and methyl isobutyl ketone in the method by the use of a different sorbent tube (Anasorb CMS) , a 30-day storage stability study, and replacement of the packed column with a Rtx-35 fused silica capillary column.
NIOSH Manual of Analytical Methods (NMAM) , Fourth Edition KET ON ES I: MET HO D 255 5, Issue 1, dated 15 M arch 200 3 - Page 2 o f 5 REAGENTS:
EQUIPMENT:
1. 2. 3. 4. 5. 6. ”

“ Carbon disulfide is toxic, explosive, and a fire hazard (FP = -30°C) . W ork with carbon disulfide in a well ventilated hood. Analytes should be handled in a fume hood. Use protective clothing and eyew ear.
SAMPLING: 1. Calibrate each personal sampling pump with a representative sampler in line. 2. Break the ends of the sampling tube imm ediately before sampling. Attach sampling tube to personal sampling pump with flexible tubing. 3. Sa m ple at an accu rately know n flow rate between 0.01 a nd 0.2 L/m in for a total sam ple size of 3 L for acetone and 10 L for all other analytes. ”

“ 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 sorbent sec tion. Discard the urethane foam plugs. 6. Ad d 1.0 m L of carbon disulfide into each vial. Attach crim p caps to each vial. 7. Allow to stand fo r 30 m inutes with oc cas ional agitation.
CALIBRATION AND QUALITY CONTRO L: 8. Ca librate daily with at least six working s tandards from below the LOD to 10 times the LOQ . ”