Characterization of the SCP 1021 Aerosol Sampler
Abstract
This study characterized the SCP 1021 aerosol sampler (SCP Dynamics, Inc., Minneapolis, MN) at flow rates of 1350 L/min and 1000 L/min. Polydisperse aluminum oxide (Al2O3) particles were used as the solid particles, and the analysis was by Coulter counter. Fluorescent oleic acid particles were used as the monodisperse liquid particles, and the analysis was by fluorometry. The results show that: (1) the sampling efficiency curves for both solid and liquid particles have a peak at approximately 5-6 micrometers, (2) there are no significant differences between the sampling efficiencies of the 1350 and 1000 L/min air flow rates, (3) there is no difference in sampling efficiency between the liquid and solid particles for particles smaller than 6 micrometers; however, large (> 6 micrometers) solid particles bounce when they hit surfaces and are carried by the air to the collection site, resulting in higher sampling efficiency for solid particles, (4) removing the inlet cap and the pre-collector increases the sampling efficiency for particles larger than approximately 4 micrometers, and (5) washing the final stage stem shows that there is significant particle loss in the stem that takes the aerosol to the liquid impaction/bubbling site.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 2001
- Accession Number
- ADA397460
Entities
People
- Jana S. Kesavan
- Robert W. Doherty
Organizations
- Edgewood Chemical Biological Center