Accession Number:

AD0686356

Title:

NOVEL MULTI-SLIT LARGE-VOLUME AIR SAMPLER

Descriptive Note:

Corporate Author:

FORT DETRICK FREDERICK MD

Report Date:

1968-05-31

Pagination or Media Count:

5.0

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 litersmin, 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.

Subject Categories:

  • Microbiology
  • Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE