Citation:
LIU Xiao-Lei, LIU Jie, GUO Rui, ZHAO Xing-Ru, SHEN Jin-Shan. Ultra Performance Liquid Chromatography-Tandem Mass Spectrometry for Determination of Per-and Polyfluorinated Compounds in Surface Water[J]. Chinese Journal of Analytical Chemistry,
;2018, 46(9): 1400-1407.
doi:
10.11895/j.issn.0253-3820.171373
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A method for simultaneous determination of perfluoroalkyl carboxylic acids (PFCAs), perfluoroalkyl sulfonic acids (PFSAs), perfluoroalkyl phosphonic acids (PFPAs), perfluoroalkyl phosphinic acids (PFPis) and polyfluoroalkyl phosphoric acid diesters (diPAPs) from water by solid phase extraction-ultra performance liquid chromatography-tandem mass spectrometry (SPE-UPLC-MS/MS) was established. During solid phase extraction process, 6 mL of ammonia-methanol (1.0%, V/V), 12 mL of methanol, 12 mL of ultrapure water were used to activate the WAX cartridges. After sample loading, the cartridges were eluted with 6 mL of ammonia-acetonitrile (0.5%, V/V), 6 mL of ammonia-methanol (1.0%, V/V) and 6 mL ammonia-acetonitrile (1.0%, V/V). Before instrumental analysis, the sample extract was divided into three parts. For the PFCAs and PFSAs, equal parts of ultrapure water were added to the extract. For the PFPAs, equal parts of 25 mmol/L of tetra-butyl ammonium sulfate were added to the extract. For the PFPis and diPAPs, the solution was methanol. The results showed that the recoveries of target compounds were between 55%-125% with relative standard deviation varying from 0.30% to 15%. Method detection limit and quantitative limit were 0.003-0.215 ng/L and 0.01-0.714 ng/L, respectively. This method was simple with high sensitivity and good reproducibility, and suitable for simultaneous determination of five kinds of per-and polyfluorinated substances in water.
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