Mancini, L. H.Bonotto, Daniel Marcos [UNESP]2014-05-202014-05-202002-10-01Applied Radiation and Isotopes. Oxford: Pergamon-Elsevier B.V., v. 57, n. 4, p. 591-600, 2002.0969-8043http://hdl.handle.net/11449/33326This work describes a methodology developed for performing the extraction, detection and quantification of Ra-228 in waters, suspended solids and sediments. The technique proved to be useful for analyzing samples from the hydrological environment of Morro do Ferro, Pocos de Caldas plateau, Brazil. The 228Ra activity in underground waters of 5 boreholes drilled in the area varied from 0.02 up to 14.5 Bq/l, whereas for the surficial waters the variation was from 0.04 to 0.51 Bq/l; for the suspended solids, the values ranged from 1.5 up to 419 Bq/g, whereas it was possible to find a value of 2.04 Bq/g for the sediments. These results show the applicability of the method for characterizing different matrices of environmental interest. (C) 2002 Elsevier B.V. Ltd. All rights reserved.591-600engRa-228waterssedimentssuspended solidsArtigo10.1016/S0969-8043(02)00132-XWOS:000178260800018Acesso restrito7430102726026121