Determination of technetium-99 in soils and radioactive wastes using ICP-MS

摘要: Three methods have been used for the determination of 99Tc in soils and solid radioactive wastes using 99mTc as a yield monitor. In method one three samples were leached low concentrated nitric sulphuric acid. Many contaminants then co-precipitated with Fe(OH)3 alkali media Tc supernatant was separated anion-exchange extraction chromatography. There made also some studies how to improve chemical recovery process two sample ashed 8 mol dm−3 HNO3 after iron precipitation, technetium on chromatographic column. The optimized chromatography leaching. Typical recoveries determined tracer all these range 39 %–87 %. activity measured proportional low-background beta detector week staying allow decay activity. by non-radiometric inductively coupled plasma mass spectrometer.