Determination of 210Pb and 210Po in mineral and biological environmental samples

摘要: The paper deals with the determination of 210 Pb and Po in mineral biological environmental samples. were preconcentrated from filtered water samples by coprecipitation iron(III) hydroxide at pH 9-10 using ammonia solution precipitate was dissolved HCl mineralized H2O2. soil or sediment, algae mussel sequentially leached out 250 °C HNO3 +HF, HClO4 HCl. About 10-20% leaching used for which carried 85-90 4 hours suspending a silver disk 1.5 containing some hydroxylamine hydrochloride sodium citrate. No preliminary separation required essentially quantitative recoveries obtained standard 209 tracer. remains first separated BIO-RAD-AG 1-X4 resin column, then purified Na2S to as PbS finally precipitated PbSO4 source preparation. Starting 3 g sediment (30 liter water), lower limits detection method 0.73 Bq.kg-1 (0.078 mBq.l-1 ) 0.25 (0.016 Po. procedure has been checked two certified supplied International Atomic Energy Agency (IAEA) reliable results obtained. Most analyzed sediments, showing average yields 84.2±5.2% 96.4±4.1%