Li Y, Geng X C, Yu H Q, Wan G J
State Key Laboratory of Dryland Farming and Soil Erosion in the Loess Plateau, Institute of Soil and Water Conservation, CAS and MWR, Yangling 712100, China.
Appl Radiat Isot. 2011 Feb;69(2):516-20. doi: 10.1016/j.apradiso.2010.10.023. Epub 2010 Oct 29.
The effect of the composition of the used standard reference material (SRM) on results of determination of fallout radionuclides in soil samples was studied. Using five soil types as SRMs, we measured the specific activity of (210)Pb and (137)Cs in six target samples of Chestnut soil. It was observed that the determination of the (210)Pb activity in the samples depended on the chemical composition of SRMs used to create the efficiency curves. Thus, using SRMs similar in chemical composition to the target samples should improve accuracy in the determination of (210)Pb in environmental samples.
研究了所用标准参考物质（SRM）的组成对土壤样品中沉降放射性核素测定结果的影响。我们使用五种土壤类型作为标准参考物质，测量了六个栗钙土目标样品中（210）Pb和（137）Cs的比活度。观察到样品中（210）Pb活度的测定取决于用于绘制效率曲线的标准参考物质的化学成分。因此，使用化学成分与目标样品相似的标准参考物质应能提高环境样品中（210）Pb测定的准确性。
