Evaluation of Membrane Filter Field Monitors for Microbiological Air Sampling

Selection of Filter Media in Alpha Air Monitors for Emergency Environmental Monitoring

INTRODUCTION We have developed an alpha air monitor which is possible to measure rapidly and sensitively the concentrations of airborne alpha-emitting particles, such as plutonium, for the environmental monitoring at an accident of nuclear reprocessing plant. The monitor is designed to collect airborne alpha-emitting particles by drawing the ambient air through a filter and to detect the activi...

Evaluation of air sampling methods for abrasive blasting.

The National Institute for Occupational Safety and Health (NIOSH) investigators compared methods for collecting personal breathing zone (PBZ) air samples for particulates during abrasive blasting at a shipyard. Abrasive blasting is the cleaning or finishing of surfaces by the use of an abrasive carried in a strong current of air. The U.S. government has provided regulatory requirements and guid...

A Comparison of True Alpha Activities in Air Filter Samples with Values Obtained from Radioactivity-in-air Monitors

A fundamental problem with measurements of alpha activity on air filters from the nuclear workplace is that the calibration sources used with radioactivity-in-air monitors are not in the same physical form as actual samples. The samples suffer from alpha absorption due to effects such as self-attenuation within the radioactive particle, entrapment of the particle within the filter, and the accu...

Best Practices for Using Microbiological Sampling

Microbiological Contamination of Hospital Air

GREENE, V. W. (University of Minnesota, Minneapolis), D. VESLEY, R. G. BOND, AND G. S. MICHAELSEN. Microbiological contamination of hospital air. II. Qualitative studies. Appl. Microbiol. 10:567-571. 1962.-Over 10,000 airborne microorganisms, isolated from various areas of two hospitals, were characterized according to colonial and microscopic morphology and certain physiological reactions, inc...