一次消解土壤样品测定汞、砷和硒

发布时间：2018-01-14 00:21

本文关键词：一次消解土壤样品测定汞、砷和硒　出处：《分析化学》2017年08期 　论文类型：期刊论文

【摘要】：建立了测定土壤中3种挥发性元素(汞、砷、硒)的一次消解方法,确定以程序控温石墨自动消解仪+王水-氢氟酸-硼酸络合敞开体系为最佳消解体系,采用氢化物发生-原子荧光光谱法(HG-AFS)分别测定同一消解液中汞、砷、硒的含量。采用国家标物中心有证标准物质土壤环境样品GSS-1~GSS-8进行了方法验证,结果均符合标准偏差的允许范围。此消解方法相比于现行标准方法,避免了针对各元素的分次处理,简化了消解步骤,节省了前处理时间,减少了试剂消耗,提高了实验效率,适用性广、灵敏度高、检出限低,尤其适合批量样品的微量/痕量元素分析,可作为一种大规模土壤样品中重金属污染监测和治理的快捷方法。
[Abstract]:A primary digestion method for the determination of three volatile elements (mercury, arsenic, selenium) in soil was established. The mercury and arsenic in the same solution were determined by hydride generation-atomic fluorescence spectrometry (HG-AFS). The content of selenium. The method of GSS-1~GSS-8 was used to verify the content of selenium in the soil environmental samples of the certified reference material in the National Standard Center. The results all accord with the allowable range of standard deviation. Compared with the current standard method, this digestion method avoids the fractionation of each element, simplifies the digestion steps, saves the pretreatment time and reduces the reagent consumption. It can improve the experimental efficiency, wide applicability, high sensitivity, low detection limit, especially suitable for the determination of trace / trace elements in batch samples. It can be used as a quick method to monitor and control heavy metal pollution in large scale soil samples.
【作者单位】：中国科学院南京土壤研究所土壤与农业可持续发展重点实验室;南京林业大学南方现代林业协同创新中心南京林业大学生物与环境学院;
【基金】：国家自然科学基金项目(Nos.41230855,31670615,31270664)资助~~
【分类号】：O657.31;X833
【正文快照】： 1引言氢化物-原子荧光光谱法(HG-AFS)因其化学蒸气分离、非色散光学系统、灵敏度高、检出限低等特性,被广泛用于汞、砷、硒、铋、锑、碲、锗、锡、铅、镉等元素的痕量/超痕量分析[1~4],其中汞、砷、硒、铅、镉等重金属元素又是土壤环境质量评价中最为关注的元素。目前,测定土

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