Effect of sampling time on airborne fungal collection.
Indoor Air '90, The 5th International Conference on Indoor Air Quality and Climate, Toronto, July 29 - August 3, 1990, 1990 Jul; :91-95
A study was conducted on the effects of length of sampling time on the mean and variance of the number of colony forming units identified in air samples from office buildings. The air in six different rooms within an office building was sampled for airborne fungi levels using sampling times of 1, 3, and 5 minutes. It was found that the variance decreased with increasing sampling time. The variance seen among the samples obtained after 1 minute of sampling was over 6.5 times that seen after 5 minutes of sampling. In addition, the mean number of colony forming units/cubic meter of air determined after a 1 minute sampling time was twice as high as that found after a 5 minute sampling time. The mean colony forming unit/cubic meter of air as determined after 1 minute of sampling was found to vary significantly from that determined after 3 or 5 minutes of sampling. The authors conclude that sampling time appears to have a major effect on the mean and variance of values obtained for fungi colony forming units/cubic meter of indoor air.
Analytical-methods; Laboratory-techniques; Organic-dusts; Air-sampling-techniques; Air-quality; Microorganisms; Indoor-air-pollution; Indoor-environmental-quality
Indoor Air '90, The 5th International Conference on Indoor Air Quality and Climate, Toronto, July 29 - August 3, 1990