硒的分析中所涉及的环境和生物样品的基体复杂,且在样品中的含量都很低,所以在分析前往往需要对样品进行分离预富集.分离预富集过程中必须保证真实样品中硒元素各形态之间的平衡,同时又要尽可能消除杂质或溶剂的干扰,减少基体效应[1].主要应用于无机硒的经典分离富集方法有共沉 Environmental and biological samples involved in the analysis of selenium have complex matrix with low content in the sample, so it is often necessary to separate and pre-enrich the samples before analysis.In the pre-enrichment process, it is necessary to ensure that in real samples Selenium balance between the various forms, but also as much as possible to eliminate the interference of impurities or solvents to reduce the matrix effect [1]. The main application of inorganic selenium classic separation and enrichment methods have co-sink