title: Continuous and discrete on-site detection of radon-222 in ground- and surface waters by means of an extraction module.
abstract: A robust and straightforward method for on-site determination of radon-222 activity concentrations in water is presented. The methodical approach is based on the principle of liquid-gas-membrane extraction. An extraction module, which consists of hollow polypropylene fibres, allows radon stripping from the water of interest into a connected closed air-loop. The resulting radon-in-air activity concentration, which can easily be reconverted into the original radon-in-water activity concentration is measured by means of a standard mobile radon-in-air monitor. The experimental set-up allows radon detection in discrete water samples as well as continuous water pump streams. The technique, covering a wide activity concentration range, is in particular advantageous for measurements of radon-in-water in the field or on research cruises.
authors.affiliation: Department of Analytical Chemistry, Helmholtz-Centre for Environmental Research-UFZ, Leipzig, Germany. axel.schmidt@ufz.de
authors.forename: Axel
authors.initials: A
authors.lastname: Schmidt
authors.forename: Michael
authors.initials: M
authors.lastname: Schlueter
authors.forename: Martin
authors.initials: M
authors.lastname: Melles
authors.forename: Michael
authors.initials: M
authors.lastname: Schubert
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D011874:Radiometry / Q000295:instrumentation* / Q000379:methods; D011886:Radon / Q000032:analysis*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013048:Specimen Handling / Q000295:instrumentation* / Q000379:methods; D014875:Water Pollutants, Radioactive / Q000032:analysis*
chemical_list: D014875:Water Pollutants, Radioactive; D011886:Radon