National Institute for Occupational Safety and Health

“ Analyte, reagent grade. Helium, purified. Hydrogen, prepurified. Air, compressed, filtered.
See SPECIAL PRECAUTIONS SPE CIAL PR ECAU TIO NS: Carbon disulfide is toxic and an acute fire and explosion hazard (flash point = -30 °C) ; work with it only in a hood. W ear appropriate protective clothing and gloves.
SAMPLING: 1. Calibrate each personal sampling pump with a representative sampler tube in line. 2. Break the ends of the sampler tube immediately before sampling. Attach sampler tube to personal sampling pump with flexible tubing. 3. ”

“ High humidity greatly reduces sampler capacity and breakthrough volume.
INTERFERENCES: None identified.
OTHER METHODS: This method, NMAM 1450, Issue 3 is an updated analytical procedure [5] . This method originally combined and replaced the NMAM 2nd edition Methods S31, S32, S35, S37, S41, S44 through S48, and S51 [3] . Estimated LOD for each analyte is approximately 10 times lower than that of the previous methods.
NIOSH Manual of Analytical Methods (NMAM) , Fourth Edition EST ERS 1: MET HO D 145 0, Issue 3, dated 15 M arch 200 3 - Page 2 o f 6 REAGENTS:
EQUIPMENT:
1. ”

“ S am pler: glass tube, 7-cm long, 6-mm OD, 4m m ID, flame-sealed ends, containing two sections of activated (600 °C) coconut s hell charcoal (front - 100 mg; back - 50 mg) separated by a 2-m m ureth ane foam plug. A silylated glass wool plug precedes the front section and a 3-m m urethane foam plug follows the back section. ”