Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Measurement of the Biotransfer and Time Constant of Radon from Ingested Water by Human Breath Analysis.
Author Brown, W. L. ; Hess, C. T. ;
CORP Author Maine Univ. at Orono. Dept. of Physics and Astronomy.;Environmental Protection Agency, Cincinnati, OH.
Publisher c1992
Year Published 1992
Report Number EPA-R-815156; EPA/600/J-92/196;
Stock Number PB92-189026
Additional Subjects Radon 222 ; Breath tests ; Scintillation counting ; Pharmacokinetics ; Dosimetry ; Potable water ; Questionnaires ; Stomach ; Reprints ;
Library Call Number Additional Info Location Last
NTIS  PB92-189026 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 08/22/1992
Collation 11p
Forty-one tests were performed on 38 volunteers to measure elimination rates of (222)Rn in expired breath. Participants ranged from ages 9 to 85 y, with 16 males and 22 females. The levels of physical activity of the subjects ranged from very inactive to marathon level. Calibration of the flow-through scintillation cell was accomplished using a medical ventilator and (222)Rn reservoir for 5-15 L/min flow rates. The authors found a wide range of percent elimination (12-68%) in 30 min. The percent elimination has a mild correlation with the predicted forced expiratory volume in 1 s and with time passed since eating. Their observations of bio-retention half-times range from 17-400 min. The whole-body dose calculations yield a mean of 2.70 + or - 3.43 nGy/Bq, and the stomach dose calculations yield a mean of 276 + or - 186 nGy/Bq. These means range beyond those previously reported. (Copyright (c) 1992 Health Physics Society.)