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Evaluation of the Uncertainty Associated to the Determination of Heavy Metals in Seawater Using Graphite Furnace Atomic Absorption Spectrometry

机译:石墨炉原子吸收光谱法测定海水中重金属的不确定度评定

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This work describes the estimation of uncertainty following the "bottom-up" and the "top-down" approaches for the determination of several trace metals in seawater when using a classical 1-pyrrolidinedithiocarbamate/diethyldithiocarba-mate/freon extraction method followed by electrothermal atomic absorption spectrometry.A detailed analysis of the uncertainty sources of this method is included,which allows estimating the expanded uncertainties.The results show that the main contribution to the relative overall uncertainty is the extraction step.The estimation of the uncertainty components is shown to be a suitable tool for the experimental design in order to obtain a small uncertainty in the analytical result.
机译:这项工作描述了使用经典的1-吡咯烷二硫代氨基甲酸酯/二乙基二硫代氨基甲酸酯/氟利昂萃取法然后进行电热原子萃取时,采用“自下而上”和“自上而下”方法测定海水中几种痕量金属的不确定度估计包括对这种方法不确定性来源的详细分析,可以估算扩展的不确定性。结果表明,相对总不确定度的主要贡献是萃取步骤。不确定性成分的估算表明用于实验设计的合适工具,以便在分析结果中获得较小的不确定性。

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