Determination of 210Pb, 226Ra and 137Cs in sediments

摘要: Abstract A method is described for bringing a sediment sample into solution and subsequently carrying out analysis 210 Pb, 226 Ra 137 Cs. Silica removed from the by cyclic HNO 3 HF treatments. Cs separated in carbonate fusion, extracted absorption on ammonium molybdophosphate, precipitated directly with BiI presence of citric acid, β-counted. Pb are 70–75% precipitation. Further purification mutual separation two radionuclides achieved solvent extraction anion-exchange techniques. determined β- α- counting their chromate precipitates, respectively, after allowing suitable ingrowth periods daughters. The procedural steps effectively eliminate possible interference other natural or fall-out radioactivities.