National Institute for Occupational Safety and Health, NIOSH Manual of Analytical Methods… (1994)
“ Background absorption is overcome by the use of a deuterium background corrector. Matrix modification with Ni 2+ solution allows the use of a higher char temperature in the graphite furnace. Other particulate arsenic compounds will interfere. ”
National Institute for Occupational Safety and Health, NIOSH Manual of Analytical Methods… (1994)
“ Dilute the calibration stock solution 1:100 with 1000 μg/mL Ni ++ solution. This standard is 10.0 μg/mL As. Prepare fresh daily. Prepare six working standards covering the range 0 to 1.25 μg/mL As. a. Add aliquots of the 10.0 μg/mL As solution to 10-mL volumetric flasks and dilute to volume with 1000 μg/mL Ni 2+ solution. b. Analyze the working standards together with the samplers and blanks (steps 13 and 14) . c. Prepare calibration graph (absorbance vs. solution concentration, μg/mL) . Inject a standard for every other sample to check instrument drift. ”
National Institute for Occupational Safety and Health, NIOSH Manual of Analytical Methods… (1994)
“ The working range is 0.001 to 0.06 mg/m 3 for a 200-L air sample. This method collects particulate arsenic compounds as well as arsenic trioxide vapor. If only total particulate arsenic is of interest, the use of the treated filter and analysis of the backup pad is not required. ”
