NOVEL MULTI-SLIT LARGE-VOLUME AIR SAMPLER
Abstract
Scientific investigators who are interested in the various facets of airborne transmission of disease in research laboratories and hospitals need a simple, continuous, high-volume sampling device that will recover a high percentage of viable microorganisms from the atmosphere. Such a device must sample a large quantity of air. It should effect direct transfer of the air into an all-purpose liquid medium in order to collect bacteria, viruses, rickettsia, and fungi, and it should be easy to use. A simple multi-slit impinger sampler that fulfills these requirements has been developed. It operates at an air-sampling rate of 500 liters/min, has a high collection efficiency, functions at a low pressure drop, and, in contrast to some earlier instruments, does not depend upon electrostatic precipitation at high voltages. When compared to the all-glass impinger, the multi-slit impinger sampler collected microbial aerosols of Serratia marcescens at 82% efficiency, and aerosols of Bacillus subtilis var. niger at 78% efficiency.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 31, 1968
- Accession Number
- AD0686356
Entities
People
- C. M. Dahlgren
- C. R. Phillips
- D. E. Frisque
- H. M. Decker
- L. M. Buchanan