A multi-stage, low flow rate cascade impactor

Ultrasonic and Jet Aerosolization of Phospholipids and the Effects on Surface Activity

“…This is several orders of magnitude larger than the times found necessary for size equilibration of saline aerosols at a given humidity (1,6). After equilibration, the particle size distribution of the aerosol was measured with a seven stage cascade impactor as described by Mercer et al (14). In this type of apparatus, the aerosol flows through small holes past a series of stages.…”

Effects of sulfate aerosols in combination with ozone on elimination of tracer particles inhaled by rats

“…Aerosols were produced from an aqueous suspension of 0.1% solids (by volume), using a Lovelace-type laboratory compressed-air nebulizer (Aries Inc., Davis, Calif.). The MMAD of the aerosol particles, as determined with a multistage laboratory impactor (Aries Inc., Mercer et al, 1970) was about 1.6 /im.…”

Effects of Repeated Exposure to Nitric Acid Vapor and Ozone on Respiratory Tract Clearance in the Rat

“…The aerosolized particles were dried by heating and dilution with filtered air and electrically discharged using an 85Kr discharger before entering the nose-only exposure chamber (Raabe et al, 1973). The labeled aerosol, sampled from the breathing zone of the rats using a calibrated Mercer-type seven-stage cascade impactor (Mercer et al, 1970) (In-Tox Products, Albuquerque, NM), had an activity median aerodynamic diameter of 1.8 pm and a geometric standard deviation (GSD) of less than 1.3. After 3 6 wk of pollutant or purified air (control) exposure, 12 rats at a time were exposed simultaneously to the radioactive aerosol in this system for 30 min.…”