Development and evaluation of a method to estimate potential formaldehyde dose from inhalable dust/fibers.
Kennedy-ER; Gagnon-YT; Teass-AW; Seitz-T
Appl Occup Environ Hyg 1992 Apr; 7(4):231-240
A method for estimating formaldehyde (50000) dose from inhalable airborne dust/fibers was described. Applicability of the method to actual field conditions was noted. The method incorporated an inhalable sampler for collection of the dust/fibers. Filters containing sampled dust/fibers were placed in distilled water and incubated at 37 degrees-C for 4 hours to free the formaldehyde. Detection limits were 0.44 and 0.08 micrograms per filter sample for the chromotropic-acid and the 2,4-DNP procedures, respectively. Inhalable and closed face samplers were compared to cassette samplers at a garment factory and a waterbed accessory operation. At the garment factory, the inhalable samplers collected more dust/fibers; at the accessory facility, sampler efficiencies were comparable. The authors suggest that, although the hydrolysis procedure employed to liberate formaldehyde from dust/fibers may differ from that in the nasal and oropharyngeal passages, collection levels approximated localized inhaled dose.
NIOSH-Author; Analytical-methods; Air-quality-monitoring; Dust-exposure; Sampling-methods; Dust-inhalation; Dust-samplers
Eugene R. Kennedy, Methods Development Section, Methods Research Branch, Division of Physical Sciences and Engineering, National Institute for Occupational Safety and Health, 4676 Columbia Parkway, Cincinnati, Ohio 45226
Applied Occupational and Environmental Hygiene