同位素稀释技术在土壤微量元素地球化学活性分析中的应用

土壤中微量元素的地球化学活性是评价土壤质量以及环境风险的重要指标.现有的分析方法虽多,但因技术限制难以适用于所有类型的土壤,致使标准不统一,对科研工作提供的参考性不足.同位素稀释技术(isotopic dilution technique)对固/液交换过程造成的扰动极小,近年来被越来越多的研究人员认为是量化土壤微量元素...

Isotopic Dilution Technique in Analyzing Geochemical Lability of Soil Trace Elements

The geochemical lability of trace elements in soil is an important index for its quality evaluation and environmental risk assessment. Although there are many existing analytical methods, it is not applicable to all types of soil due to technical limitations. As a result, the standards are not unified and there is a lack of reference for scientific research work. The isotopic dilution technique for solid/liquid exchange process disturbance is tiny. Therefore, in recent years more and more researchers considered that the isotope dilution technique is one of the most effective and appropriate methods to quantify the geochemical lability of soil trace elements. Combined with inductively coupled plasma mass spectrometry, the method quantifies the labile pool of trace elements in soil by introducing E-value as the isotope exchangeable pool of trace elements during redistribution. The results can not only evaluate the bioavailability of trace elements, but also provide more abundant information for soil environmental quality evaluation. This paper mainly introduces the principle, method development and research process of isotope dilution technique in analysing trace element lability.