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Detection of Trace Amounts of Toxic Metals in Environmental Samples by Laser-excited Atomic Fluorescence Spectrometry

机译:激光激发原子荧光光谱法检测环境样品中的痕量有毒金属

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摘要

Results for the direct determination of trace amounts of Pb and Cd in Antarctic and Greenland ancient ice and recent snow by laser-excited atomic fluorescence spectrometry (LEAFS) are presented. The whole procedure starting from field sampling, mechanical decontamination of the samples in an ultra-clean laboratory and final analysis of the decontaminated samples is described. The measured concentrations varied in the ranges 0.1–3 pg ml^(–1) for Cd and 0.3–30 pg ml^(–1) for Pb. The results for direct analysis by LEAFS agree favourable with those obtained by isotope dilution mass spectrometry and electrothermal atomic absorption spectrometry, which require time-consuming pre-treatment and pre-concentration stages.
机译:给出了用激光激发原子荧光光谱法(LEAFS)直接测定南极和格陵兰古冰和最近积雪中痕量铅和镉的结果。描述了整个过程,包括现场采样,在超净实验室中对样品进行机械净化以及对净化后的样品进行最终分析。 Cd的测量浓度范围为0.1–3 pg ml ^(-1),Pb的测量浓度范围为0.3–30 pg ml ^(-1)。 LEAFS直接分析的结果与同位素稀释质谱法和电热原子吸收光谱法获得的结果相吻合,这需要耗时的预处理和预浓缩阶段。

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