Environmental Science and Pollution Research

, Volume 18, Issue 7, pp 1108–1120 | Cite as

Polyfluorinated surfactants (PFS) in paper and board coatings for food packaging

Research Article

Abstract

Introduction

In this study, we explore the identity of a range of polyfluorinated surfactants (PFS) used for food contact materials, primarily to impart oil and water repellency on paper and board. PFS are of interest, as they can be precursors of poly- and perfluorinated alkyl substances (PFAS), of which several are persistent and are found worldwide in human blood and in the environment.

Materials and methods

To determine the elemental composition of PFS, we combined information from patents, chemical suppliers and analyses of industrial blends using ultra performance liquid chromatography-negative electrospray ionisation quadrupole time-of-flight mass spectrometry.

Results

At a high pH of 9.7, both non-ionic and anionic PFS were ionised and were recognised by negative mass defects of exact masses, and neutral fragment losses of n × 20 or n × 100 Da. More than 115 molecular structures were found in industrial blends from the EU, US and China, belonging to the groups of polyfluoroalkyl-mono- and di-ester phosphates (monoPAPS, diPAPS and S-diPAPS), -ethoxylates, -acrylates, -amino acids, -sulfonamide phosphates and -thio acids, together with residuals and synthesis byproducts. In addition, a number of starting materials such as perfluorooctane sulfonamide N-alkyl esters were analysed. Di- and trialkylated PAPS and S-diPAPS were found in migrates from European food contact materials.

Conclusion

This study highlights the need to monitor for more types of PFS in order to map the sources of PFAS in humans and the environment.

Keywords

Fluorinated surfactants Screening Identification Accurate mass spectrometry UPLC-ESI-QTOF Food contact materials Migration 

Supplementary material

11356_2010_439_MOESM1_ESM.doc (70 kb)
Supporting information 1DOC 69.5 kb
11356_2010_439_MOESM2_ESM.pdf (64 kb)
MSMS spectra of two peaks in FF10 (PDF 63.9 KB)
11356_2010_439_MOESM3_ESM.docx (15 kb)
Table S1Precursor and product ions of a selection of PFS (DOCX 15.2 kb)
11356_2010_439_MOESM4_ESM.docx (12 kb)
Table S2Method performance parameters of the UPLC-ESI--QTOF MS method for diPAPS, PFOA and PFOS (DOCX 11.8 kb)
11356_2010_439_MOESM5_ESM.docx (11 kb)
Table S3LC retention times and MS parameters for the HPLC-ESI--QqQ MS method for diPAPS and S-diPAPS (DOCX 11.4 kb)

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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  1. 1.Department of Basic Sciences and Environment, The Faculty of Life SciencesUniversity of CopenhagenFrederiksbergDenmark
  2. 2.Technical University of Denmark, The National Food InstituteSøborgDenmark

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