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Analysis of Perfluoroalkyl Acids in Wastewater, Sludge, and Liver Extracts Using High-Resolution, Accurate Mass LC-MS

Instrument Type: LCMS

Perfluoroalkyl acids (PFAAs) are global pollutants and have been shown to bioaccumulate in the food chain. PFAAs have been detected in livers of fish, birds, and marine mammals from Greenland and the Faroe Islands.1 Biomagnification of perfluorooctane sulfonate (PFOS), the predominant fluorochemical detected, was observed along the marine food chain (Figure 1). We demonstrate the performance of the Exactive highresolution, accurate mass benchtop liquid chromatography-mass spectrometry (LC-MS) system in the analysis of ten selected perfluoroalkyl acids.


Instrument Type: HPLC

Acclaim PA2 色谱柱是一种新型的亲水性硅胶反相色 谱柱,与传统的C18填料的区别不仅在于碳链的长短不 同,而且表现在其结构中嵌有极性较大的磺酰胺基团, 这一结构上的特点决定了该色谱柱填料既可以在一定程 度上增强对极性化合物的保留,又可在一定程度上降低 对极性小的弱极性化合物的保留,因此应用范围广泛。 本文以Acclaim PA2为分析柱,硼酸和乙腈为淋洗液。硼 酸在碱性溶液中形成四硼酸钠,四硼酸钠是一种淋洗能 力较弱的淋洗液,利用四硼酸根的弱淋洗特点,将样品 中的PFOA和PFOS保留在Acclaim PA2保护柱上,同时利 用全氟类化合物的非极性差异,改变乙腈的浓度调整化 合物在色谱柱上的分离度。实验证明:样品中含有的其 他离子在Acclaim PA2色谱柱上的保留很弱,对PFOA和 PFOS的分析基本无干扰。

Analysis of perfluoro-octanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS) in tap water using reversed-phase HPLC with suppressed conductivity detection

Instrument Type: HPLC

The separation of perfluoro-octanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS) in tap water was performed on a Thermo Scientific Acclaim PolarAdvantage II (PA2) HPLC column, with on-line sample concentration and suppressed conductivity detection. Chromatogram A is Sunnyvale tap water spiked with PFOA and PFOS and chromatogram B is a control.