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. 2016 Nov 25;409(5):1395–1404. doi: 10.1007/s00216-016-0072-1

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© The Author(s) 2016

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 5 — Percent recoveries of the volatile PFASs (20 ng each) by HLB enrichment using three different techniques; n = 4 for volatilization method, and n = 1 for direct addition and enrichment of fortified water (*7:1-FTAC and 7H-6:1-FTI are enrichment control standards)