Abstract
The processes of passive sampling and electret collection are discussed. Two types of passive sampling chamber have been developed in our laboratory: a passive sampling chamber with electret collection (PSCE) used for environmental radon concentration monitoring and radon flux rate measurement; and a passive sampling chamber with and without electret collection (PSCP) used as a personal radon dosemeter and area radon monitor. The lower limits of detection for radon concentration monitoring are 3.0 T-1, 2.0*102 T-1 and 3.8*103 T-1 Bq m-3 for PSCE and PSCP with and without electret collection, respectively, where T is the sampling period in hours. The lower limit of detection for radon flux rate measurement with PSCE is 2.0*10-4 T-2 Bq m-2 s-1. The characteristics of the passive sampling monitoring techniques and some monitoring results are described.
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