Comprehensive Validation of the Adsorbable Organic Fluorine Analysis and Performance Comparison of Current Methods for Total Per- and Polyfluoroalkyl Substances in Water Samples
Comprehensive Validation of the Adsorbable Organic Fluorine Analysis and Performance Comparison of Current Methods for Total Per- and Polyfluoroalkyl Substances in Water Samples
复制标题
DOI：
10.1021/acsestwater.1c00047
复制
发表时间：
2021-05-13
期刊：
影响因子：
--
通讯作者：
Sun, Mei
中科院分区：
文献类型：
--
作者：
Han, Yuling;Pulikkal, Vivek Francis;Sun, Mei
全氟烷基物质和多氟烷基物质在环境中被广泛检测到，而其中大量物质无法通过目前的分析方法进行识别和/或定量。本研究对可吸附有机氟（AOF）法进行了改进和验证。改进的方法的检测限和定量限分别为300和400 ng/L，比以前报道的AOF方法更灵敏。29种PFAS的AOF回收率为53- 113%，而3种短链PFAS由于吸附效率低而回收率较低（19-39%）。PFAS混合物在不同环境水基质中的回收率为64- 84%，氟化物、溶解有机物或其他基质成分的存在对PFAS混合物的影响可忽略不计。验证的方法被应用到不同的环境水样，AOF数据进行了比较，从其他总PFAS分析，包括总氟，可提取的有机氟，总可氧化的前体，并总结个人PFAS的结果。除两个样品外，目标PFAS分析的氟含量仅占AOF浓度的0.4-29%，表明AOF对估计未知PFAS浓度、筛选PFAS污染和评估PFAS暴露具有重要意义。
Per- and polyfluoroalkyl substances (PFASs) are widely detected in the environment, while a large number of them cannot be identified and/or quantified by current analytical methods. As a surrogate total PFAS analysis, the adsorbable organic fluorine (AOF) method was improved and validated in this study. The improved method has limits of detection and quantification of 300 and 400 ng/L, respectively, more sensitive than the previously reported AOF methods. AOF recovery for 29 individual PFASs ranged 53-113%, while three short-chain PFASs yielded lower recovery (19-39%) due to low adsorption efficiency. Recovery for PFAS mixtures in different environmental water matrices was 64-84%, and was negligibly impacted by the presence of fluoride, dissolved organic matter, or other matrix constituents. The validated method was applied to different environmental water samples, and AOF data were compared to results from other total PFAS analyses, including total fluorine, extractable organic fluorine, total oxidizable precursors, and summed individual PFASs. The fluorine contents from targeted PFAS analysis only contributed 0.4-29% of AOF concentrations in all except two samples, indicating the significance of AOF for estimating unknown PFAS concentrations, screening PFAS contamination, and assessing PFAS exposure.