Abstract Water bodies of numerous countries and regions in the world have been contaminated to various extents with the widespread production and usage of perfluoroalkyl substances (PFASs). Both domestic and industrial wastewaters become one of the important sources for the PFAS contaminations in natural water bodies, due to the incomplete treatment. Usually, the artificial wastewaters are complex and have high concentrations of inorganic salts, which could result in the matrix effects during the process of analysis for PFASs, contributing to quantify the target compounds inaccurately. In order to monitor the concentrations of PFAS contaminants precisely, suitable extraction methods were compared focusing on the matrix effects and characters of green analytical chemistry during the detection of perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) existing with several common inorganic salts in wastewaters. The results showed that the analytical values of PFOA and PFOS were 2.8–3.6 times and 3.0–5.2 times higher than the theoretical values, respectively. The liquid-liquid extraction (LLE) and solid phase extraction (SPE) methods were used to reduce the matrix effects originated from inorganic salts, consequently the SPE method was confirmed as the optimal extraction method, based upon both the recoveries and green procedures. Combined with the application of the best parameters in real industrial wastewaters, indicating the present study would provide an accurate and green quantitative analysis of PFASs in salty wastewaters.

中文翻译：

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优化废水处理过程中含盐基质中 PFOA 和 PFOS 的提取方法

摘要 随着全氟烷基物质（PFASs）的广泛生产和使用，世界上许多国家和地区的水体都受到了不同程度的污染。由于处理不彻底，生活和工业废水都成为天然水体中PFAS污染的重要来源之一。通常，人工废水复杂且无机盐浓度高，这可能会导致 PFAS 分析过程中的基质效应，从而导致目标化合物的定量不准确。为了精确监测 PFAS 污染物的浓度，在检测废水中与几种常见无机盐一起存在的全氟辛酸 (PFOA) 和全氟辛烷磺酸 (PFOS) 过程中，针对基质效应和绿色分析化学的特性，比较了合适的提取方法。结果表明，PFOA和PFOS的分析值分别比理论值高2.8-3.6倍和3.0-5.2倍。液-液萃取 (LLE) 和固相萃取 (SPE) 方法用于减少源自无机盐的基质效应，因此基于回收率和绿色程序，SPE 方法被确认为最佳提取方法。结合最佳参数在实际工业废水中的应用，