A fast and simple PFAS extraction method utilizing HR-CS-GFMAS for soil samples.
A fast and simple PFAS extraction method utilizing HR-CS-GFMAS for soil samples.
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DOI：
10.1016/j.chemosphere.2022.133922
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发表时间：
2022-02
期刊：
影响因子：
8.8
通讯作者：
Fabian Simon;Lennart Gehrenkemper;M. Au;Philipp Wittwer;P. Roesch;Jens Pfeifer;Antje Cossmer;
中科院分区：
文献类型：
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作者：
Fabian Simon;Lennart Gehrenkemper;M. Au;Philipp Wittwer;P. Roesch;Jens Pfeifer;Antje Cossmer;
在这里，我们描述了一个优化的快速和简单的提取方法，利用高分辨率连续源-石墨炉分子吸收光谱法（HR-CS-GFMAS）测定土壤中的全氟和多氟烷基物质（PFASs）。为了克服有机结合氟分析中常用的固相萃取（SPE）步骤的偏倚，我们优化了一种快速简便的无SPE萃取方法。开发的提取方法包括使用酸化甲醇的液-固提取，无需任何额外的SPE。四个浸提步骤具有代表性，可确定高比例的乙醇（8次浸提中>80%）。比较优化的方法，并没有一个额外的SPE净化步骤，揭示了一个显着低估的浓度使用SPE。观察到高达94%的差异，这是无法解释的共提取无机氟化物。因此，开发了不仅更准确而且更经济和生态的方法（绕过不必要的SPE）。所开发方法的程序定量限（LOQ）为10.30 μg/kg，足以定量所有供试样品中的肌酐浓度。对于未来的PFAS监测和潜在的监管决策，本文提出的优化提取方法可以提供有价值的贡献。
Here, we describe an optimized fast and simple extraction method for the determination of per- and polyfluorinated alkyl substances (PFASs) in soils utilizing high resolution-continuum source-graphite furnace molecular absorption spectrometry (HR–CS–GFMAS). To omit the bias of the solid phase extraction (SPE) step commonly used during the analysis of extractable organically bound fluorine (EOF) we optimized a fast and simple SPE-free extraction method. The developed extraction method consists of a liquid-solid extraction using acidified methanol without any additional SPE. Four extraction steps were representative to determine a high proportion of the EOF (>80% of eight extractions). Comparison of the optimized method with and without an additional SPE clean-up step revealed a drastic underestimation of EOF concentrations using SPE. Differences of up to 94% were observed which were not explainable by coextracted inorganic fluoride. Therefore, not only a more accurate but also a more economic as well as ecologic method (bypassing of unnecessary SPE) was developed. The procedural limit of quantification (LOQ) of the developed method was 10.30 μg/kg which was sufficient for quantifying EOF concentrations in all tested samples. For future PFAS monitoring and potential regulative decisions the herein presented optimized extraction method can offer a valuable contribution.