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International Journal of Environmental Analytical Chemistry

Year: 2011  |  Volume: 91  |  Issue: 12  |  Page No.: 1117 - 1134

Method development for analysis of short- and long-chain perfluorinated acids in solid matrices

Fei Li, Chaojie Zhang, Yan Qu, Jing Chen, Xiang Hu and Qi Zhou

Abstract

In order to help to elucidate the transport and fate of perfluorinated acids (PFAs) in the environment, a reliable and sensitive analytical method has been developed in present study for determination of short- and long-chain PFAs in various solid matrices. The method consisted of solvent extraction of PFAs from solid matrices using sonication, solid phase extraction (SPE) using weak anion exchange (WAX) cartridges, clean-up of SPE eluent with dispersive carbon sorbent and quantitation by high performance liquid chromatography-negative electrospray-tandem mass spectrometry (HPLC-negative ESI-MS/MS). The method detection limits (MDL) and quantitation limits (MQL), which were analyte- and sample-dependent, ranged from 0.02 to 0.06 ng g−1 and 0.10 to 0.90 ng g−1, respectively. The recoveries of all PFAs were generally good enough for quantitative analysis of these chemicals (57−115%), especially for short-chain (<C8, 80−115%) PFAs excluded in previous studies because methods were not available. The precisions of this method, represented by the percent relative standard deviation (RSD) of spiked measurements, were in a range of 1−19%. In addition, matrix effect did not affect analyte quantification in solid matrices in most cases, and the validated method was successfully applied to analyses of short- and long-chain PFAs in various solid matrices.

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