Abstract
This paper presents a method for measuring indoor radon concentrations using a commercially available air-purifying respirator filter as a component of the radon monitor. The filter used was Survivair’s NIOSH (National Institute for Occupational Health and Safety)-approved 100800 model. The method is based on the diffusion of radon gas into the activated carbon of the filter and the measurement of the radioactive daughters resulting from the radon decay. The photopeaks of the 214Bi daughter gamma rays (0.609 MeV) were analyzed with a Hyper-Pure Germanium (HPGe) detector and a multichannel system. A monotonically increasing and very close to linear response relation between the integrated area under the 214Bi photopeak and the radon concentration of the activated carbon was found. A well-defined relation held for radon levels ranging from 15 to 4,700 Bq/m3. This procedure results in highly reproducible and reliable measurements of indoor radon levels. Interesting applications include the investigation of radiological accidents involving radon and the retrospective measuring of indoor radon concentrations by analyzing the filters of the respirators worn by personnel working during the relevant period.
Similar content being viewed by others
References
Nazaroff WW, Nero AV (1988) Radon and its decay products in indoor air. Wiley, New York
Espinosa G, Golzarri JI, Bogard J, Gaso I, Ponciano G, Mena M, Segovia N (2008) Radiat Meas 43:S431
Amoros R, Bolta JM, Navarro E, Roldan C (1995) Radon levels in the Valencian Community (Spain). I. Results in the Province of Valencia (1990–1991). J Environ Radioact 27:125
Iiomoto T, Tokonami S, Morishita Y, Kosaki T (2005) J Environ Radioact 78:69
Tommasino L (1998) Radiat Prot Dosim 78:55
Iiomoto T, Akasaka Y, Koike Y, Kasoko T (2008) J Environ Radioact 99:587
Groves-Kirkby CJ, Denman AR, Crockett RGM, Phillips PS, Woolrige AC, Gillmore GK (2006) J Environ Radioact 86:92
Cohen BL, Cohen ES (1983) Health Phys 45:501
George AS (1984) Health Phys 46:867
Yu KN, Guan ZJ, Young ECM, Stokes MJ (1998) Appl Radiat Isot 49:1691
ANSI (1978) Calibration and usage of germanium detectors for measurement of gamma-ray emission of radionuclides. American National Standards Institute, N42.14-1978
Acknowledgements
This work was partially supported by PAPIIT-DGAPA-UNAM project 1N107707. The authors wish thanks to J.I. Golzarri, J. Martinez, D. Aguilar, A. García and A. Huerta for their technical help.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Espinosa, G., Silva, R.J. Industrial commercial respirator filter as indoor radon monitor. J Radioanal Nucl Chem 282, 405–408 (2009). https://doi.org/10.1007/s10967-009-0142-3
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10967-009-0142-3