论文部分内容阅读
环境中的硒是具有重要意义的元素之一,但天然水及土壤水浸液中Se(Ⅳ)的含量常低于现有氢化物发生原子吸收测定法定量限1—2个数量级,需要经过复杂的浓集处理后才能进行分析。由于处理过程较长,不仅操作费时而且极易造成污染。本项工作把高效率的流动注射氢化物发生原子吸收分光光度测定方法与流动注射在线离子交换预浓集技术结合,成功地建立了测定水及土壤水浸液中Se(Ⅳ)的方法。 采用填充D201型大孔强碱阴离子交换树脂(50目,沈阳有机化工厂生产)的微型离子交换柱(内径3.0mm,长45mm)吸附天然
Selenium in the environment is one of the important elements, but the content of Se (Ⅳ) in natural water and soil water immersion liquid is often lower than the limit of 1-2 orders of magnitude by the existing hydride generation atomic absorption spectrometry, Complex concentration processing before analysis. Due to the long process, it is not only time-consuming and pollution-prone. In this work, an efficient method for the determination of Se (Ⅳ) in water and soil aqueous extracts was successfully established by the combination of high performance flow injection hydride generation atomic absorption spectrophotometry and flow injection on-line ion exchange preconcentration. Using a miniature ion exchange column (inner diameter 3.0 mm, length 45 mm) packed with D201 macroporous strong base anion exchange resin (50 mesh, manufactured by Shenyang Organic Chemical Industry) adsorbed natural