Abstract:
:The "radon emanation" method of analysis for Rn and Ra in natural waters has been used by scientists for more than 30 years. We have examined the use of a new plastic bottle design as a viable option and improvement to traditional glass designs. The advantages of the new design over that used previously in our laboratory include a larger volume, lower blank, less fragile nature, and ease of handling in the field. Extensive calibration of the new design yielded an average efficiency of 70.9 +/- 1.7% and showed that an accurate blank value can be determined for each sample based on its specific holding time. Based on a 5-L sample and a 60-min count time, minimum detectable activities (MDA) range from 1.0 to 1.2 mBq L for Rn and Ra, respectively. Memory effect experiments have shown that activity artifacts are negligible when reusing the sampling containers. In addition, intra- and inter-laboratory comparisons show that the new design gives reliable results.
journal_name
Health Physjournal_title
Health physicsauthors
Stringer CE,Burnett WCkeywords:
subject
Has Abstractpub_date
2004-12-01 00:00:00pages
642-6issue
6eissn
0017-9078issn
1538-5159pii
00004032-200412000-00015journal_volume
87pub_type
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