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Experimental evaluation of oil mists using a semivolatile aerosol dichotomous sampler.

Authors
Kim-SW; Raynor-PC
Source
J Occup Environ Hyg 2010 Feb; 7(4):203-215
NIOSHTIC No.
20036486
Abstract
The sampling performance of the semivolatile aerosol dichotomous sampler (SADS) was tested and compared with existing vapor and particle sampling methods: filtration, electrostatic precipitation, and vapor adsorption. Seven different test fluids were used to generate test droplets, and their concentrations and composition in each phase were evaluated using gas chromatography. The amount of wall loss inside the SADS was also evaluated. Combined vapor and particle concentrations for each test aerosol were not statistically different from one another as a function of test method. However, the particle concentrations estimated using the SADS were statistically higher than those from the other methods. In experiments with hexadecane, the particle concentrations estimated using the SADS, an electrostatic precipitator, and a glass fiber filter were 2.50 mg/m3, 0.05 mg/m3, and 0.01 mg/m3, respectively. For commercial metalworking fluid (MWF) droplets, compounds having low molecular weight were more prevalent in the vapor phase than those compounds with high molecular weight. The compositions of the particle phase were similar to those of the original fluids. The wall losses of hexadecane and bis(2-ethylhexyl) sebacate (BEHS) were 0.25% and 26.5% of combined vapor and particle concentrations in the SADS sampling, respectively. Because it can avoid evaporative losses, SADS will sample semivolatile aerosols more accurately than common filtration methods and may often yield higher particle concentrations than can be measured using the other methods.
Keywords
Absorption-rates; Aerosol-particles; Electrostatic-filters; Exposure-assessment; Exposure-levels; Exposure-methods; Filters; Gas-filters; Gas-liquid-chromatography; Molecular-structure; Particle-aerodynamics; Particle-counters; Particulates; Particulate-sampling-methods; Statistical-analysis; Vapors; Author Keywords: metalworking fluids; phase distribution; semivolatile organic compound
Contact
Seung Won Kim, CDC, NIOSH, HELD, EAB, 1095 Willowdale Rd,MS 3030, Morgantown, WV 26505-2888
CODEN
JOEHA2
Publication Date
20100201
Document Type
Journal Article
Email Address
idt2@cdc.gov
Fiscal Year
2010
NTIS Accession No.
NTIS Price
Issue of Publication
4
ISSN
1545-9624
NIOSH Division
HELD
Source Name
Journal of Occupational and Environmental Hygiene
State
WV
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