Development of multiple-purpose aerosol generator.
Hedley-WH; Yu-HH; Cash-LN
NIOSH 1977 May; :1-57
A multiple purpose aerosol generation system was studied. The substances tested on this modified aerosol generator and homogenizer were triethylene glycol (112276), talc (14807966), halocarbon grease 25-5S, paraffin wax, and di-octyl-phthalate (117817) (DOP). One and six hour runs were done with triethylene glycol and talc. The optical particle counter (OPC) counts of triethylene glycol aerosols showed a slow steady decrease in number over a six hour period. OPC counts of talc aerosols remained steady with some fluctuation in number over a six hour period at atomizing pressures of 20 and 30 pounds per square inch. About 50 percent of talc particles were in channel one (between 0.3 and 0.5 microns). Deviations of first hour means with sixth hour means were both well within 10 percent (7.27 percent for triethylene glycol and 2 percent for talc). The mass mean diameter of the grease aerosol was 0.6 microns with a geometric standard deviation of two. The high and low of OPC total counts with paraffin wax deviated about 3 percent from the mean over a 2 hour period of the test. A four hour run with DOP had a standard deviation of the hourly means at only 0.3 percent. The authors conclude that test results generally fulfilled the contract objectives.
NIOSH-Contract; Contract-210-76-0144; Equipment-design; Aerosols; Aerosol-dispensers; Analytical-instruments; Aerosol-generators
112-27-6; 14807-96-6; 117-81-7
Final Contract Report
NTIS Accession No.
Monsanto Research Corporation, Dayton, Ohio, NIOSH, Cincinnati
Monsanto Research Corporation, Dayton, Ohio