| Literature DB >> 14106938 |
Abstract
A study of the flow regime in the commercial Andersen sampler revealed defects in the sampling of the larger airborne particles. Satisfactory sampling was obtained by redesigning the hole pattern of the top stages and adding one more stage to extend the range of the instrument. A new, rational hole pattern is suggested for the lower stages. With both patterns a special colony-counting mask can be used to facilitate the assay. A calibration of the modified system is presented which enables particle size distribution curves to be drawn from the colony counts.Keywords: AEROSOLS; AIR MICROBIOLOGY; BACTERIA; CULTURE MEDIA; EQUIPMENT AND SUPPLIES; EXPERIMENTAL LAB STUDY; SERRATIA MARCESCENS
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Year: 1964 PMID: 14106938 PMCID: PMC1058061 DOI: 10.1128/am.12.1.37-43.1964
Source DB: PubMed Journal: Appl Microbiol ISSN: 0003-6919