Abstract:
:Transportable (e.g., "giraffe") air samplers can be used for both short-term "grab-sampling" situations involving a few minutes to several hours, as well as for long-term retrospective air sampling situations that typically last a week. It is the short-term coverage situation which begs the question: "how long a sampling time is adequate?" The basis for the answer (which depends mainly on the selected volumetric sampling rate and the counter sensitivity, as well as the concentration level to be measured) can be simply viewed as follows: that an adequate activity must be measureable on the air filter sample at the cessation of sampling. Equations for selection of sampling times are presented, as are example calculations for alpha counters in order to measure various target concentrations and exposures. The concepts presented here can be readily adapted to other counting systems as well as to different sampling flow rates.
journal_name
Health Physjournal_title
Health physicsauthors
Justus ALdoi
10.1097/HP.0b013e318204aa78subject
Has Abstractpub_date
2011-08-01 00:00:00pages
S104-9eissn
0017-9078issn
1538-5159pii
00004032-201108001-00002journal_volume
101 Suppl 2pub_type
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