Hafez, M B Adsorption of radioactive elements on silica gel and its uses for determination of gross activity in urine. [electronic resource] - The International journal of applied radiation and isotopes Mar 1979 - 191-3 p. digital Publication Type: Journal Article ISSN: 0020-708X Standard No.: 10.1016/0020-708x(79)90133-9 doi Subjects--Topical Terms: Alpha ParticlesAnimalsCationsChromatography, GelHumansHydrogen-Ion ConcentrationMethodsRadioisotopes--analysisScintillation CountingSilicon DioxideUrine